Bolt won't lock on last round, input and suggestions!
Hey fellas, never really posted. But I've gotten alot of good info off this site. And honestly, I trust the opinions of some on this site better than anyone I could probably find locally.
I have a DDV7 complete upper w/ low profile gas block, mid length gas tube. And a PSA complete lower. That's has a standard spring and a DD H buffer. Anyway the rifle has ran flawless thru 1000 rounds. At about the 700 round mark I noticed the ejection pattern was changing. Because I was picking up alot less brass at the range (almost a foward ejection).
Well last trip to the range the bolt stopped locking on the last round of an empty mag. Cleaned, checked the bolt relubed. Same problem. The mags I used had previously functioned fine. And I was shooting federal xm193. Bolt locks back manually on those same mags. Put oil on the gas key and blew on it, no bubbles. Carrier key isn't loose, extractor and gas rings look fine. Gas tube in the receiver and on the barrel look lined up.
Now there is some new wear on the face of the hammer. And there is corresponding new wear on the bottom of the carrier itself. Now when I was shooting. I used the mag as a monopod. But have read this is ok? I haven't contacted DD yet because think my upper maybe fine. But can anyone tell me what the heck it going on with my gun? Thanks any input would be greatly appreciated ;)