I've been working on a load to take to wyoming this fall for antelope. This is my first experience with the 7mm rem mag reloading. I'd just picked up this 700 adl black stock gun a couple of years ago, just because it was so cheap. Anyway, my problem is I can't get 2 reloads out of Fed brass without a failure. I've shot the factory Fed round, full length resized it, shot it and now down to a bit over o.4 groups @ 100, but when i try for a 2nd reload of that brass I almost always get a failure with separation. I'm trying a couple of things, like bumping the shoulder instead of complete full length resize and trying some once fired Rem brass from another gun, full length resize. The load is on the warm side, but not max. This is the first belted mag i've owned and loaded for. I've been loading for others for 35 years i'd say and never had anything like this problem. Any ideas, it's going to antelope season before long and i'm still working, though the once fired fed brass gives a great group with 67.3 of 4350, 140 sierra gameking bt and cci 250 mag primers.