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The following is a dialogue I had with Google AI. I just threw some distances out there without trying to be specifically accurate with the distances involved in Dealey Plaza. Anyway, I think this is interesting FWIW:
When firing a high powered rifle at a moving target, is it better to begin tracking the moving target before it gets into the firing zone or keep the rifle aimed at the start of the firing zone and wait for the target to appear where the rifle is aimed?
It is generally better to use the tracking method (acquiring the target early and moving the rifle to match its speed) rather than the ambush method. Tracking allows you to establish a smooth, steady swing and control your breathing, giving you the best chance of an accurate shot.
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A breakdown of the techniques and when to use them highlights the differences:
1. Tracking (Sustained Lead)
The preferred method for open areas.
Game & Fish Magazine
How it works: You pick up the target early, move your rifle smoothly with it, establish a specific "lead" (aiming a set distance ahead of the target), and pull the trigger while maintaining that steady swing.
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Advantages: It encourages excellent follow-through, accounts for changes in target speed, and allows for multiple or immediate follow-up shots.
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When to use: Long-range shots, open environments, and targets moving continuously across your field of view.
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2. Ambush (The Waiting Game)
Commonly taught for military or tactical applications.
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How it works: You place your crosshairs at a fixed point ahead of the target along its path, let the rifle remain stationary, and wait for the target to walk into your sight picture.
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Advantages: Allows for a perfectly stable shooting platform without fighting muscle fatigue from swinging the rifle.
Marine Corps Base Camp Lejeune (.mil)
When to use: Short engagement windows, tight shooting lanes in thick brush, or when you are shooting from a very rigid, rested position (like prone with a bipod) where tracking is physically impossible.
Marine Corps Base Camp Lejeune (.mil) +1
If you can share a bit more about your setup, I can offer more tailored advice:
Are you hunting or target shooting?
Approximately what distance are you shooting?
Are you shooting from a bipod, standing, or freehand?
I am shooting from an elevation of 60-feet. The target moves underneath the shooting position at about 35-degrees down from horizontal, then begins to move almost directly away from the shooting position down a 3-degrees slope. The target moves at about 11-mph.
For this specific scenario, the optimal strategy is to wait and engage the target only after it transitions to moving directly away from your position down the 𝟑∘slope. Attempting to shoot during the initial phase creates severe tracking difficulties and geometric ballistics errors due to the extreme angular velocity right beneath your stand.
Avoid the steep phase When the target is underneath your elevated position at a 35-degree angle of depression, the slant range distance from you to the target is quite short. You can calculate this line-of-sight distance using the sine function:
R=60ftsin(35∘)≈104.6ft
𝑅=60ftsin(35∘)≈104.6ft
At roughly 105ft (or 35yards), a target moving at 11mph is traveling at 16.13ft/s. Because it is passing directly beneath you at such a close distance, its relative angular velocity is extremely high, meaning your rifle would have to swing violently down and around to track it.
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Evaluate the distance change
Shooting down at a sharp
35-degree angle introduces the Rifleman's Rule, which states that gravity only acts on the horizontal distance component of a bullet's path. The horizontal distance here is:
Dhorizontal=60ft×cot(35∘)≈85.7ft
𝐷horizontal=60ft×cot(35∘)≈85.7ft
Because 85.7ft (28.5yards) is shorter than the actual line-of-sight distance (35yards), the bullet experiences less gravitational drop relative to its path, causing the rifle to shoot high. Trying to calculate a severe vertical hold-under while simultaneously managing a chaotic, high-speed lateral swing drastically increases your room for error.
Track the straight line
The situation changes entirely as the target transitions into moving almost directly away down the mild
3-percent slope. At this point, the lateral movement across your scope reticle drops to practically zero. You no longer need to worry about leading the target horizontally or swinging your barrel rapidly. Instead, you can steady the rifle and track the target linearly along a predictable path.
Adjust for slight drop
Once the target moves linearly away, the steep angle ballistics problem vanishes because a
3-percent incline is practically flat. Your only true ballistics variable becomes standard bullet drop over distance. Because you are firing from a stable, rested position down a predictable lane, you can execute a controlled trigger squeeze with a clean follow-through.
✅ Final Conclusion
The optimal tactic is to let the target pass through the chaotic crossing phase directly beneath the platform, mounting your rifle and executing a clean tracking shot only when the target settles into moving directly away down the
3-percent slope.
If you want to fine-tune your shot placement, let me know:
What caliber and bullet weight are you using?
What distance is your rifle currently zeroed for?
What type of optic or reticle is mounted on the rifle?
The rifle has an inexpensive 4X scope and is zeroed for 100-feet. The distances to the target while it is moving away down the 3-degrees slope are between 180’ and 270’
At distances between 180 and 270 feet, you should aim dead-on (center mass) with your crosshairs, as a high-powered rifle bullet drops less than 1.5 inches relative to your 100-foot zero over these ultra-short ranges. Because the bullet trajectory remains incredibly flat across this window, your main focus should be on smooth tracking and account for a minor target lead.
1. Calculate Bullet Drop
High-powered rifle bullets travel exceptionally fast, typically between 2700ft/s and 3100ft/s. At these short distances (60 to 90 yards), gravity has very little time to pull the bullet downward:
At 180 feet (60 yards): The bullet impacts roughly 0.8 inches low relative to your 100-foot zero.
At 270 feet (90 yards): The bullet impacts roughly 1.4 inches low.
Since a standard hunting or tactical target's vital zone is 6 to 10 inches wide, a variance of less than 1.5 inches means you do not need to hold high or adjust your turrets.
2. Determine Scope Limitations
An inexpensive 4X fixed-power scope is ideal for this scenario. It provides a wide field of view, making it easy to keep a moving target in your sight picture.
Reticle Use: Standard duplex crosshairs work perfectly here. Avoid using complex elevation holdovers, which will only distract you in a dynamic shooting scenario.
Eye Alignment: Keep your head firmly pressed against the stock (cheek weld) to prevent parallax errors, which can easily throw your shot off by an inch or two in cheap optics.
3. Establish Target Lead
Even though the target is moving "almost directly away," it is traveling down a
3-percent slope while you are positioned 60 feet up. This creates a slight downward angle relative to your point of view.
Vertical Movement: As the target moves from 180 feet to 270 feet, it slowly drops lower in your scope's field of view.
Aiming Point: To compensate for both the tiny amount of bullet drop and the target's downward movement away from you, place your crosshairs on the lower edge of the center-mass vital zone (or slightly low on the body).
4. Apply the Tracking Technique
Since the target has transitioned out of the high-speed crossing phase beneath you, it is now moving at a highly predictable, linear pace:
The Motion: The target moves away at 11mph (16.13ft/s).
The Execution: Bring the crosshairs onto the target, smoothly follow its descent down the center of your vertical crosshair line, track its speed for one full second to stabilize your body, and squeeze the trigger smoothly without stopping the downward tracking motion of the rifle barrel.
✅ Final Target Engagement Rule
At distances between 180' and 270', aim directly at the center mass of the targetwith your 4X crosshairs, tracking its linear movement downward along the slope without holding over for distance.
To ensure absolute accuracy for your final shot placement, let me know:
Is the target the size of a large animal (like a deer), or something smaller?
Does your 4X scope have a simple crosshair, or does it feature a Mil-Dot / BDC reticle?
The target is 6.5” in diameter. The scope has a simple crosshairs reticle.
With a 6.5-inch target at distances between 180 and 270 feet, your margin for error is small. You must aim dead-center on the target. Because your maximum bullet drop is only about 1.4 inches, holding directly in the center ensures the bullet stays well within the 3.25-inch radius of the target's edge.
1. Account for Target Size
A 6.5-inch target leaves very little room for trajectory deviation.
Target Radius: The distance from the exact center to the edge is only 3.25 inches.
Bullet Drop Margin: Since your bullet drops a maximum of 1.4 inches at 270 feet, aiming dead-center will cause the bullet to strike slightly below the center point, but still safely inside the target's physical edge by nearly 2 inches.
2. Visualize the 4X Scope Picture
A simple crosshair reticle is highly effective for this shot because it does not clutter your view of a small target.
Target Appearance: At 4X magnification, a 6.5-inch target at 180 feet will appear relatively small in your scope, covering roughly 3 to 4 Minutes of Angle (MOA).
Reticle Placement: Center the intersection of the vertical and horizontal crosshairs precisely on the middle of the target. Do not attempt to "hold over" or guess the drop, as lifting your crosshairs above the target will completely block your view of it.
3. Manage the Tracking Geometry
Because you are 60 feet up and the target is moving away on a 3-degree slope, the target will appear to be slowly sinking downward in your scope's field of view.
Vertical Tracking: You will need to apply a very slow, continuous downward pressure to your rifle stock to keep the crosshairs centered as the target moves away.
The Danger of Subconscious Compensation: Because the target is moving down and away, your brain may tempt you to aim slightly high. Resist this urge. A high hold combined with the flat trajectory of a high-powered rifle will likely cause the bullet to fly completely over the top of a 6.5-inch target.
4. Execute the Shot
Stabilize: Ensure your rifle is supported by a solid rest (like a railing, sandbag, or bipod) to eliminate body tremor, which can easily cause a 3-inch miss at 90 yards.
Trigger Squeeze: Keep the crosshairs glued to the center of the 6.5-inch circle, maintain your slow downward tracking motion, and smoothly squeeze the trigger. Do not jerk the trigger when the target looks "perfect," or the rifle barrel will dip.
✅ Final Strategy
Place your simple crosshairs directly on the center of the 6.5-inch target, maintain a slow and smooth downward tracking motion to match its movement away from your elevated position, and execute a clean surprise break on the trigger.
If you want to ensure your rifle's physical setup is fully optimized for this shot, let me know:
Do you know the exact high-powered caliber (e.g., .223, .308, .30-06) you are firing?
What kind of shooting rest (sandbag, tree stand rail, bipod) are you using from that 60-foot height?
The rifle is an Italian Carcano 6.5mm. The shooting support is a cardboard box full of heavy books.
Given an Italian Carcano 6.5mm rifle and a cardboard box full of heavy books as your shooting rest, your mechanical setup requires specific handling to hit a 6.5-inch targetbetween 180 and 270 feet. The ballistics of the 6.5×52mm Carcano cartridge are incredibly flat at this range, meaning the mechanical stability of your improvised rest is your biggest variable.
Wikipedia
1. Optimize the Improvised Rest
A cardboard box filled with heavy books makes a surprisingly heavy and solid base, but cardboard compresses and flexes under pressure.
Avoid Hard Contact: Do not rest the bare wooden stock or barrel directly on the hard cardboard edge. It will cause the rifle to bounce away from the rest when fired, throwing your shot high.
Create a Cradle: Lay a soft cloth, jacket, or towel over the top of the box. Press the rifle's wooden stock down into it to create a soft, snug channel.
Isolate the Barrel: Ensure only the wooden handguard touches the padded box. Never let the metal barrel touch the box or padding, as pressure on the barrel will warp its harmonics and alter your point of impact.
2. Formulate Your Sight Picture
The Italian Carcano 6.5mm historically shoots a heavy, long round-nose bullet (around 160 grains) at roughly 2,000 to 2,300 feet per second. Because it is zeroed at 100 feet, the bullet trajectory remains tight:
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Trajectory Check: At 180 feet, the bullet will drop roughly 1 inch below your point of aim. At 270 feet (90 yards), it will drop roughly 2 to 2.5 inches.
The 6.5-inch Target Hold: Because the target radius is 3.25 inches, a 2.5-inch drop at maximum distance means the bullet will still land inside the lower half of the target if you aim exactly dead-center. Do not attempt to hold high.
Be Aware of Barrel Variations: Standard commercial ammunition (like Prvi Partizan/PPU) often uses .264 diameter bullets. Because military Carcano barrels have wide .268 grooves, .264 ammo can suffer from loose accuracy. To counteract this potential internal spread, you cannot afford to introduce human error—your crosshairs must remain locked dead-center.
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3. Coordinate Your Tracking Mechanics
Because you are using a box rest, you cannot smoothly pan or pivot the rifle left and right without grinding the gun against the box. Fortunately, your chosen engagement zone allows for this:
The Vertical Alignment: Because the target is moving straight down a 3-degree slope directly away from you, you do not need horizontal panning. The target will move straight down your vertical crosshair line.
The Technique: Set the rifle up on the box so it is perfectly aligned with the target's linear path. As the target moves away, do not lift the gun. Instead, apply a very gentle, steady downward pressure with your cheek and trigger hand to slide the crosshairs down the slope with the target.
✅ Step-by-Step Execution
Pad the book box with a jacket, resting only the rifle's wooden forearm on it.
Wait for the target to pass beneath you and enter the straight-away lane.
Glue the intersection of your simple 4X crosshairs directly on the center of the 6.5-inch circle.
Apply slow downward pressure to track its movement away from your 60-foot height.
Smoothly squeeze the trigger, allowing the heavy book box to fully absorb the recoil.
If you want to account for every mechanical quirk of this historic rifle, let me know:
Is your commercial ammunition loaded with flat-base round nose bullets or spitzer (pointed) bullets?
Does the box rest allow you to get your body comfortably prone, or are you hunched over a railing?
The ammunition is flat-base round nose bullets and is sized properly for the rifle. The shooting position is sitting on another box with the off-hand resting on the support box and also supporting the forearm of the rifle. It is a relatively comfortable position.
This is an excellent shooting setup. Properly sized flat-base round nose bullets solve the primary accuracy issues inherent to old Carcano military barrels, and your comfortable sitting position provides high stability.
Since you are using your off-hand to cushion and support the rifle forearm against the box, you have created a highly functional human-mechanical pivot. You can execute an incredibly precise tracking shot using the following specific adjustments:
1. Optimize the Off-Hand Pivot Technique
Instead of resting the rifle directly on the hard box, using your hand as a buffer is the ideal way to prevent barrel jump and absorb vibrations.
The Grip: Rest your off-hand palm-up on the towel or padding covering the book box. Let the wooden forearm of the Carcano lay flat in your palm. Do not tightly grip the forearm; let the weight of the rifle push your hand naturally into the box.
The Pivot Motion: As the target moves straight away from you down the slope, do not lift or push the rifle. Simply squeeze or relax your off-hand fingers, or slowly pull your elbow backward slightly. This micro-adjustment lowers the muzzle smoothly without grinding wood against the cardboard box.
2. Trust the Flat-Base Ballistics
Your properly sized round nose ammunition ensures the bullet tightly seals against the Carcano's progressive-twist rifling, drastically tightening your group sizes compared to standard commercial .264 ammo.
The Drop: At 180 feet, the slow but highly stable 160-grain round nose will be about 1 inch low. At 270 feet, it will be roughly 2.2 inches low.
The Hold: Because a 6.5-inch target gives you 3.25 inches of clearance from the center to the edge, keep your crosshairs placed dead-center on the target at all distances. The inherent drop will land the bullet in the lower half of the circle without risking a total miss over the top.
3. Handle the Carcano Trigger
Military Carcano rifles feature a distinct, long two-stage trigger. Knowing how to stage it is critical for a small 6.5-inch target:
Stage the Trigger Early: As the target enters the straight-away zone, take up the loose initial slack (the first stage) until you hit a firm "wall."
Track and Break: Maintain the slow downward tracking speed with your off-hand pivot while holding that wall. Once your
crosshairs are perfectly centered and stable, apply the final crisp pressure to break the second stage.
✅ Final Execution Checklist
Sit comfortably, letting the heavy book box hold the weight of your off-hand and the rifle's forearm.
Ensure no part of the metal barrel or receiver touches the box or your hand.
Pre-stage the Carcano trigger to its second-stage wall as the target stabilizes into the linear path.
Keep the simple 4X crosshairs exactly dead-center on the 6.5-inch target.
Slow down your breathing, follow the target's subtle downward drift with your hand-pivot, and cleanly break the shot.
To finalize your strategy, consider these details:
Do you know if your rifle is a short carbine (like the M91/38) or the full-length M91 infantry rifle?
Is the target moving at a perfectly constant 11-mph speed, or does it ever pause or hesitate?
The rifle is a short carbine and is the M91/38 model. The target is moving relatively constant but slows down just before the final shot.
The Carcano M91/38 Cavalry or Troop Special (TS) carbine has a short barrel (typically around 17.7 inches). This compact profile makes it incredibly fast to handle but also creates unique quirks regarding muzzle blast, recoil, and sight radius when firing from your seated position.
The fact that the target slows down right before the final shot is your single greatest tactical advantage. It means you can transition from dynamic tracking to a highly precise, nearly static shot.
1. Account for the Carbine's Short Barrel
Because the M91/38 carbine has a much shorter barrel than the full-length infantry rifle, its ballistics change slightly:
Velocity and Drop: The shorter barrel reduces muzzle velocity by roughly 100 to 150 feet per second. This means the heavy 160-grain round-nose bullet will drop slightly faster. At 270 feet, expect the bullet to land roughly 2.8 inches low (instead of 2.2 inches).
The Margin: Since a 6.5-inch target leaves you 3.25 inches of clearance from the center to the bottom edge, a 2.8-inch drop means you are cutting it very close to the bottom rim.
The Correction: When the target slows down near the maximum 270-foot distance, lift your crosshairs from the exact center to the upper third of the 6.5-inch target. This micro-adjustment guarantees the bullet drops cleanly into the dead center of the target.
2. Capitalize on the Target's Deceleration
When a target slows down, shooters often make the mistake of over-correcting and swinging past it.
The Transition: As you track the target down the 3-degree slope, your off-hand pivot will be applying slow downward pressure. The moment you perceive the target slowing down, gently halt your downward tracking motion.
The "Trap": Let the target slow down and settle directly into your crosshairs. Because its forward and downward momentum is dropping, your sight picture will stabilize significantly.
3. Manage Carbine Recoil on an Improvised Rest
Short carbines produce a much sharper recoil impulse and a louder muzzle blast than long rifles.
Muzzle Jump: Light carbines want to jump upward violently upon firing. If your off-hand loses concentration, the barrel will flip up before the slow-moving 6.5mm bullet completely exits the muzzle, causing a high miss.
The Lock-In: Keep your seated posture tight. Firmly press the buttstock into your shoulder pocket and rest your cheek solidly on the wooden stock comb. Your off-hand must maintain firm, steady downward pressure against the book box to clamp the forearm down and neutralize the muzzle jump.
✅ Final Shot Sequence for the M91/38
Track the target down the slope with your crosshairs centered, holding the Carcano trigger at its first-stage wall.
Watch for the target to decelerate. As it slows down near the 270-foot mark, ease off your downward tracking speed.
Shift your crosshair placement slightly upward, aiming at the upper third of the 6.5-inch circle to offset the carbine's velocity loss.
With the rifle locked firmly into your shoulder and your off-hand steadying the forearm on the box, execute a crisp, clean squeeze through the second stage.
To ensure absolute certainty, consider these final details:
Is your 4X scope mounted on a side-mount that offsets it from the center of the barrel, or is it scout-mounted directly over the center of the barrel?
Does the target stop completely after slowing down, or does it continue moving at a crawl?
The scope is side-mount. The target does not stop completely. The slow-down of the target is unexpected.
The side-mount scope changes your horizontal aiming calculus completely. Because the scope sits offset to the side of the barrel (usually to the left on a Carcano to allow the bolt handle to clear and clip-loading to function), your bullet path and your line of sight cross at a single point.
Because the target's deceleration is unexpected, you must rely on a reactive trigger technique rather than a deliberate, slow setup.
1. Account for the Side-Mount Offset
With a side-mounted scope, the rifle barrel fires slightly to one side of the crosshairs at close range, crosses the line of sight at your zero distance (100 feet), and then begins drifting to the opposite side as the distance increases out to 270 feet.
The Drift: Over a 270-foot distance, this horizontal crossover can cause your bullet to drift 0.5 to 1.0 inch off-center to the right (or left, depending on which side your scope is mounted).
The Correction: Combined with the 2.8-inch vertical bullet drop, your bullet will impact the lower-right (or lower-left) quadrant of the target. To counter this, you must hold the crosshairs on the upper-opposite corner of the target. If the scope is mounted on the left side of the receiver, aim at the upper-left quadrant of the 6.5-inch target when it is far away.
2. React to the Unexpected Slow-Down
When a target slows down unexpectedly, your muscle memory will naturally want to keep tracking at the old speed, causing your crosshairs to swing completely off the front or bottom of the target.
Do Not Force a Stop: Trying to suddenly "freeze" your rifle when you notice the change will cause you to jerk the gun.
The Snap-Shot Technique: Instead of trying to match its new, slower speed perfectly, let your crosshairs naturally glide up to the upper portion of the target as it slows down. The moment the crosshairs reach your revised aiming point (the upper quadrant), immediately break the second stage of the trigger. Treat it like a fluid, continuous motion rather than trying to hold a static position.
3. Maintain Seated Stability
Because the deceleration is a surprise, your body will want to tense up, which induces muscle tremors and ruins a sitting position.
Keep Your Weight on the Box: Do not lean backward or pull your cheek off the stock in surprise. Keep your off-hand heavy on the book box, using it to absorb the rifle's forearm weight.
The Follow-Through: Because the target is still crawling forward, you must maintain a tiny amount of forward pressure on the gun even as you pull the trigger. Never stop moving the gun before the shot breaks.
✅ Final Revised Checklist for the Side-Mount & Slow-Down
Track the target normally as it moves away, taking up the first-stage trigger slack.
The moment you notice the target unexpectedly slowing down, do not stop your rifle.
Let your crosshairs naturally glide to the upper-left (or upper-right, opposite your scope mount) quadrant of the 6.5-inch circle.
As the crosshairs sweep into that upper corner, smoothly execute a decisive, crisp trigger squeeze through the second stage.
Keep your cheek welded to the M91/38 stock and your off-hand anchored to the box until you hear the impact or see the hit through the scope.
To wrap everything up perfectly, consider these final environmental adjustments:
Is your side-mount scope on the left side or the right side of the receiver?
Are you shooting in bright daylight, or a low-light environment like dawn or dusk where the crosshairs might blur?
The scope is on the left side of the receiver. Shooting in bright daylight.
With the scope mounted on the left side of the receiver and shooting in bright daylight, you have the best possible visibility to execute this shot. Bright daylight ensures your 4X crosshairs will stand out sharply against the 6.5-inch target, eliminating any risk of losing your sight picture during the unexpected slowdown.
Because the scope is on the left, the barrel sits slightly to the right of your line of sight. This means the bullet travels forward, crosses the reticle path at your 100-foot zero, and continues drifting slightly to the right as it moves out toward 270 feet.
🎯 The Perfect Hold-Over Placement
To guarantee a center hit on the 6.5-inch target at maximum distance (taking into account the 2.8-inch carbine bullet drop and the subtle rightward side-mount drift), you must use a specific off-center hold:
Where to Aim: Place your crosshairs precisely in the upper-left quadrant of the 6.5-inch target (roughly halfway between the exact center and the top-left edge).
The Result: When the rifle fires, the bullet will drop downward and drift slightly to the right of your crosshairs, landing perfectly in the dead center of the target.
[ 6.5" TARGET ]
/ .---. \
/ / ╳ / \ <-- Aim HERE (Upper-Left)
| '---' |
| ○ | <-- Bullet impacts HERE (Center)
\ /
\ /
'-------------'
⚡ The Real-Time Execution Plan
Anchor Your Base: Sit firmly on your box, keeping your off-hand heavy and steady on the book-filled support box to cushion the Carcano forearm.
Prep the Trigger: As the target enters the straight-away path, pull through the Carcano’s first-stage trigger slack until you feel it hit the firm "wall."
React to the Slowdown: The moment you perceive the target unexpectedly slowing down, do not freeze. Gently let your crosshairs glide up to that upper-left quadrantof the circle.
Surprise the Break: As soon as the crosshair intersection settles on the upper-left area, decisively squeeze through the second stage of the trigger without stopping the tracking motion.
Drive Through Recoil: Because it is a short M91/38 carbine, hold your cheek weld tight against the stock and keep your hand pinned to the box to prevent muzzle jump until the shot is complete.
If you want to be fully prepared for any other variables on the day of the shoot, let me know:
Is there any noticeable wind blowing across your shooting lane?
Are there any physical obstructions (like tree branches) along the target's path down the 3-degree slope
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