08-31-2020, 04:22 AM
I re-barreled with an Odin 18" Intermediate a while back. The advice I got from them was to use any standard factory ammo and do a 1-3-3-3-5-5. 20 rounds and you're done. The shop that did the barrel job also mentioned that most AR's are over-gassed, just to make sure they function. Mine was set fairly low. The first shot failed to lock back so I opened it one turn. No problems since.