I was at the range the other day shooting my 1919 .308 off my AA tripod, shooting .308 paki ammo. As I was going thru my 200 round linked box, I had a case explode on me. It blew up on the underside of the gun sending shrapnel into my legs and stomach area, and going to the hospital. I had adjusted my headspace a while ago, and ran fine execpt for a broken case after about 400 rounds. What might have caused this, It did not hurt the gun as I blew out the bottom. Just sort of worried about this happening again, do not want to back to the hospital. Thanks, Jerod