Failure to eject/ bolt stuck

[andrewtac]

I had similar issues on an AR10, ultimately the fix was to give up on 300wsm and went to 6.5 creedmoor. It happened the same, cases stuck and I had to mortar them out or use a cleaning rod. I did have a handful eject but they almost dribbled out of the gun. I tried different barrels, gas tubes, heavy buffer, heavy spring, polish chamber, adjustable block, and a few other things I am sure I am forgetting now. One thing I found is the gas tube location on the 308 rifles is supposed to be in the center of the half circle cutout, probably similar on the AR15. What I suspect was happening on mine was it was overgassed, and it was a timing issue. The bolt was unlocking to soon and the bolt was trying to eject the case while it was expanding, prior to it contracting. Or who knows, I really never got it to run; but runs now with the creedmoor barrel. Anyways, no gas symptoms could also be over gas, or timing issues.