ALright, lets move past the new age stuff, and go onto the stuff about the Neanderthal, I guess, you were talking about.
First off, caveman is sort of a all encompassing phrase. Early humans and hominids all took advantage of caves as a natural form of shelter, as well as many other creatures, as many do today.
The traces found on the skull are much more likely to have been caused by smelting, making copper points and blades has been known about for some time, nothing really unusal there.
As for the holes, I dunno. THe old folks were pretty resourceful, they had to be for their environment. THey had a tool that enabled them to throw about twice as far as they could normally, iif someone attacked another with the weapon at a angle, it would produce a straight line of entry.

I only know of by theory how the Neanderthal was pushed to end of it limits and boundaries by early man.As far primitive man interactions with apelike Australopithecus ramidus with example Homo eredus they lived different timelines.

EDIT of title of thread:

"Possible early man interaction with high velocity projectile"

the apparent "bullet hole" is certainly odd; but you have to question the source of the article . . . the means of which the skull was obtained . . . by whom it was discovered. It has a lot of proverbial holes. (pun intended)

[edit on 6/16/2008 by JPhish]

There's a big difference between animals that are beastly and apeish, and human beings who are sophisticated.