So just looking for a little input. I have a vintage M1 I have only shot twice, same box of 50 Winchester 110 gr. First time about a year ago from the same box all was fine, yesterday 25 more rounds out of the same box, collecting brass I had 3 split cases. I got the box of ammo from my uncle and we are both about 98% sure this is factory ammo. What is the obvious issue? Chamber issue? I have read about some brittle winchester brass. They could possibly be reloads I guess, but no signs of loading on the case, no flat primers. The worst part is my son was shooting it !