I’m shooting factory loaded 5.56 ammo out of a AR-15, FN 5.56 chambered barrel and I’m popping primers out of the shell and they’re also showing signs of pressure on the popped primers. I don’t want to say the ammo manufacturer yet. The ammo is accurate for what this barrel is capable of.
Also, I’m getting a failure of the bolt to fully close about every 8-10 rounds. I drop the mag and action the rifle a few times and it feels a little sticky when it finally catches the round and strips it out. I’ve only shot probably 2-300 rounds through it. Always suppressed. Could the chamber already have carbon ring? Or is this barrel possibly really tight chamber? I haven’t checked with a go/no-go gauge but would that be my next step? Only thing that does help is tons of lube. Or could this be an ammo issue?
Also, I’m getting a failure of the bolt to fully close about every 8-10 rounds. I drop the mag and action the rifle a few times and it feels a little sticky when it finally catches the round and strips it out. I’ve only shot probably 2-300 rounds through it. Always suppressed. Could the chamber already have carbon ring? Or is this barrel possibly really tight chamber? I haven’t checked with a go/no-go gauge but would that be my next step? Only thing that does help is tons of lube. Or could this be an ammo issue?
