[E. Pluribus Unum]

There were at least two rifles involved. The first shot was from a lower-velocity round that didn’t cause explosive damage when it hit, probably around 2000 fps.

The second head shot that caused explosive damage was from a much higher velocity round, probably around 3000 fps.

And it was a turkey-shoot. No particular skill was required.

[mlo]

"There were at least two rifles involved. The first shot was from a lower-velocity round that didn’t cause explosive damage when it hit, probably around 2000 fps."

Oswald had one rifle. He fired three shots. That's all there was.

[higgmeister]

You've got to be crazy to believe this foolishness.   Just Oswald, just Charley Guiteau, just Leon Czolgosz, and just Booth.   It's "Occam's razor" not rocket science or brain surgery.