I worked these up from a 110gr 30 carbine and have had no feeding issues. I step loaded from 18gr up to 20gr at 0.5gr increments and all fed fine and locked the bolt back on the empty mag.
So I loaded up a few hundred at 20gr W296 and 1.845 COL and tried to sight the F3 red dot in at about 20yds. Switched to a heavier buffer to offset the hotter load since brass was landing 3 o'clock. they then went to 4-5o'clock.
The problem I had was accuracy was lousy to say the least... As the barrel would heat up the POI would move to the right and off the paper. I tightened the F3 to make sure it wasn't moving. Tried the back up iron sights too. Still all over the place.
I pulled 200 and step loaded again. Also loaded up some other 308 bullets to see if the barrel is junk or something else is going on. Haven't made it to the range yet to try them out.
Might tear down the upper, clean everything and reassemble.
I'm not giving up on the 30 carbine bullets. At $85/k it's hard to beat. Others using the same bullet in other weapons have commented on decent accuracy. Must be something I don't have right yet.