Can anybody provide proof of a successful reenactment of Oswald's feat?

[Matt Grantham]

 Glad we agree that those conditions are reasonable Oak tress are a problem both in the fact they can deflect bullets and can diminish ones view. As to the window, well if you believe in an accurate representations,  then lets see a better recreation It is not up to me to explain the difference but to simply point out there is a difference I guess you could say there is a bit of guiding principle that would suggest a cramped space provides more difficulty than an open air experience in terms of ease in shotting, but I would have trouble explaining it to you any further than that

[Sean Kneringer]

In reality, Oswald had closer to nine seconds to complete the shooting and was helped by the fact that the limo noticeably slowed down before the head shot. Under those conditions, lots of marksmen could simulate the shooting.

[Matt Grantham]

 If there is only one foot of space between the bottom opening of the window and the floor i am pretty sure he would have to had been laying flat on his stomach to shoot

[John Iacoletti]

In reality, Oswald had closer to nine seconds to complete the shooting

You couldn't possibly know that since you don't actually know exactly when the shots were fired.

[Jack Trojan]

Has anyone tried it with a wonky scope?

[James Dahl]

Also there's only one confirmed hit from Oswald, the headshot is not confirmed to be from him, so he only had to hit once on three shots.  His second and third shots missed.

[Walt Cakebread]

In reality, Oswald had closer to nine seconds to complete the shooting and was helped by the fact that the limo noticeably slowed down before the head shot. Under those conditions, lots of marksmen could simulate the shooting.

It's not merely the rapidity of the shots  that make the feat impossible.....There was a tree between the window and the car...  A gunman couldn't have declined the muzzle of the rifle from back in the room ( he would have hit the window sill) and he could not have got up close to the window because the boxes were in the way......

The whole scenario is simply Bull Stuff......