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

[Jack Trojan]

So in a nutshell nobody could have known so the bullet was not planted?

Huh? Use some logic for a change. They needed to plant a bullet that could positively be matched to the planted rifle. Comprende?

[Jerry Freeman]

   Even if the scope were misaligned, a shooter who practiced with that rifle could compensate for any deficiency.

If a scope is out of alignment...the whole purpose of practice shooting would be to put it into alignment I would think.
At least that is what 1100% of Texas hunters do

[Jack Nessan]

Huh? Use some logic for a change. They needed to plant a bullet that could positively be matched to the planted rifle. Comprende?

So now, the conspirators did not plant a pristine bullet that had been fired into a pool of water but instead planted a bullet that has been fired through JFK and JBC? An absolutely brilliant and ingenious act. Who could ever doubt a group of conspirators that are this clever?

[John Iacoletti]

a) there’s no evidence that CE 399 was fired through JFK and JBC.

b) there’s no evidence that CE 399 was the pointed bullet that Tomlinson found on an unrelated stretcher at Parkland Hospital.

[Gerry Down]

I hear it has been done, but have never seen a specific reference or video. Ot to put it another way we can put to bed to tale that people have duplicated the feat on video

Even Gary Mack admitted that he himself, a middle aged old man at the time, could run down the stairs as quick as Oswald.

[Walt Cakebread]

Even Gary Mack admitted that he himself, a middle aged old man at the time, could run down the stairs as quick as Oswald.

Perhaps you should read "Girl on the Stairs"...    Vicky Adams and Sandy Styles were on the stairs and they saw or heard NOBODY.

[Martin Weidmann]

Even Gary Mack admitted that he himself, a middle aged old man at the time, could run down the stairs as quick as Oswald.

The question is not if it could be done in the given time. The real question is if Oswald was there to do it.