I just finished building a new Grendel with an AA 16" barrel, Surplus Ammo and Arms billet upper, Faxon group buy bolt, Nickel Boron bolt carrier, Cerro forge 80% lower, Velocity 3* trigger, A2 stock, Odin tunable gas block with mid length gas tube. I lapped the upper and then bedded the barrel.
Took it out to fire today and had some odd problems. First it wouldn't pick up a round from the magazine and chamber it. OK, changed out the mag. Still wasn't picking up a round. I loaded a single round and it did't want to chamber correctly, didn't want to go into battery. I kept working with it and got it to accept a few rounds and when it did it's accuracy was great. I tried it with new Hornady ELD's and my own reloads (both were 123gr). It didn't seem to matter some it would take and others it wouldn't. Then it would pick up a round or two and then jam and not go into battery. Some of the ammo got stuck in the chamber some didn't. However, none of it would fall out with just gravity.
I brought it home and disassembled the rifle, scrubbed the chamber with a chamber brush and Hoppes, took the bolt assembly apart (nothing there), put it back together and made some dummy rounds. After repeatedly chambering and ejecting the dummy rounds it seems to be accepting the rounds better. The rounds had a COAL of 2.250 and once a bullet got stuck and I had to tap it out with a cleaning rod.
Any advice or opinions are welcome. It's too late to make it back to the range today so I won't know if the chamber was a little tight or dirty until I can make it back to the range. I'm hoping that it will just wear in but have some doubts.
Took it out to fire today and had some odd problems. First it wouldn't pick up a round from the magazine and chamber it. OK, changed out the mag. Still wasn't picking up a round. I loaded a single round and it did't want to chamber correctly, didn't want to go into battery. I kept working with it and got it to accept a few rounds and when it did it's accuracy was great. I tried it with new Hornady ELD's and my own reloads (both were 123gr). It didn't seem to matter some it would take and others it wouldn't. Then it would pick up a round or two and then jam and not go into battery. Some of the ammo got stuck in the chamber some didn't. However, none of it would fall out with just gravity.
I brought it home and disassembled the rifle, scrubbed the chamber with a chamber brush and Hoppes, took the bolt assembly apart (nothing there), put it back together and made some dummy rounds. After repeatedly chambering and ejecting the dummy rounds it seems to be accepting the rounds better. The rounds had a COAL of 2.250 and once a bullet got stuck and I had to tap it out with a cleaning rod.
Any advice or opinions are welcome. It's too late to make it back to the range today so I won't know if the chamber was a little tight or dirty until I can make it back to the range. I'm hoping that it will just wear in but have some doubts.
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