AR-10 reliability questions.

[nyresq]

I have an Armalite AR-10T and it runs great with the 10round mags and the new gen II 20 round mags from Armalite. I had a DPMS LR-308 and tried three different DPMS 19 round mags and it always seemed to jam up on the second or third to last round as the round would go high and nose into the upper locking lugs.
I sold the DPMS and bought the Armalite and never looked back.
the DPMS may have been magazine related, but as I said I used three different mags, all brand new direct from DPMS. It also may have been a problem with the feed ramp, but I didn't hang onto it long enought to find out...

 

[tkcomer]

OT but, I have the exact same problem with my new DPMS LR-308B. Jams with 3 rounds left in both mags. Borrowed a mag from a friend and the gun ran flawless. So it is mag related. I've sent the mags back, but haven't received the new ones for testing.