I suggest that something smacked thar primer. IF it really went down the way the plaintiff is saying, then there must have been something in that box of ammo that shouldn't have been there. A ball of #6 shot, possibly? Maybe they're not being straight about it...maybe the kid was actually "setting it down" (and not so gently) rather than picking it up. Whatever the case may be, I think it went off because the primer was struck.
