Earlier quoted context omitted.
My guess is that those are the only wounds that are visible on the bone. On most of the rest of the body the bones are protected by soft tissue.
Maybe but I don’t think there’s that much soft tissue protecting the hands. Maybe they were stoned, then digged up for some reason? http://en.wikipedia.org/wiki/Stoning That would explain why there wasn’t any survivor able to come back later to bury her comrades (if you curl you up I’m not sure how a hailstorm could be lethal to everyone in a big group)
I think that it is probably hard to find enough hand bones to piece together to determine if they have been hit by something big and blunt after this many years.