i took my century arms wasr 10 to the range the other day to shoot it for the first time. it shot more accurately than i thought it would. the only issue is it would fail to eject the round or the bolt wouldnt go all the way forward after every two or three shots. it only has maybe 90 rounds through it. does it just need to be broken in more, do i need different magazines or ammo? anyone have any ideas?