Originally Posted by
Tweightwee
The popped primers happened with both BCs and both bolts in both BCs. But only with the Q3131A, and not with Privi or the, I misspoke earlier, LAKE CITY "green tip". I suspect the IMI loaded Winchester is a little hotter than other 5.56 ammo and is unforgiving on "tight" chambers.
The only malfunction I get when using the new BC and NOT using the Q3131A is short stroking. The gun does not pick up the next round, closes on an empty chamber and does not lock open on the last round.
I do want to find a Ned Christiansen reamer to resolve chamber problems beyond doubt.