I recently purchased a Springfield m1a socom. I took it to shoot and it did fine on the first magazine. The second magazine I pulled off one shoot and when I pulled for the second I dumped five rounds before I could get my finger off the trigger. I got the literature about slamfire issues with the gun. Read a few things online about it and everybody said it was uncommon. I was using some surplus Russian ammo bought offline from CTD. Any suggestions? I love the rifle but don't know much about slamfire and possible solutions.