JC-
Years ago I did the math on the drop of a bullet at 300 fps over 70 years, and it wasn't much.
AI version:
At 300 fps, a heavy bullet like a .30-06 drops approximately 8.5 to 9 inches at 70 yards.
So a shot aimed at JFK's head from the TSBD6 would drop down to about where he was struck in the back. Remember, I said an underpowered bullet. Many witnesses describe the first shot as faint, or different in pitch and volume, from succeeding shots.
Your math skills are about as bad as your analytical skills.
70 yards is 210 feet. At 300 fps, it would take 0.7 seconds for the bullet to travel 210 feet. Here is how AI calculated the distance the bullet would drop.
Distance Fallen in 0.7 Seconds Near Earth’s Surface
For an object in free fall from rest near Earth’s surface, the distance fallen after time
where:
d = distance fallen (meters)
g = acceleration due to gravity ≈ 9.81 m/s²
t = time fallen (seconds) The Physics Classroom+1
Substitute
t = 0.7s:
d = 1/2 × 9.81 × (0.7)squared
d = 4.905 × 0.49
d ≈ 2.40
meters
Answer: The object will fall about 2.40 meters in 0.7 seconds, assuming it starts from rest and air resistance is negligible.
Maybe LHO hand-packed his first shot, as he seemed rather thin on ammo.
It doesn't matter why the bullet was underpowered. It wouldn't effect the gravitational drop.
Then there is this:
AI version:
A bullet traveling at 300 fps at 70 yards will likely penetrate about 1 to 2 inches (2.5 to 5 cm) into human tissue. Because 300 fps is roughly the speed of an airsoft gun or a highly spent projectile, it generally lacks the energy to shatter bone or reach vital organs.
So, an underpowered hits JFK were it did, but was possibly dis-jarred by the shock wave through his body by the shot at Z-313.
This narrative rests on Paul Landis being accurate in his recollections.
Your narrative rests on accurately calculating the amount of drop. 2.4 meters is roughly 8 feet. A shot falling that far isn't going to come anywhere near JFK.