jbs27572
Member
It seems to be a good barrel. Groups with Winchester white box are clover leaves at 50 yards. I tried a few at 100 yards and groups opened up a bit but I think most of that was me rather than the rifle. I did have a few tuning issues. The barrel came with a free adjustable gas block. I started with the gas block closed and opened it up one full turn at a time but never could get the bolt to lock back reliably. Sub-X ammo doesn't even eject the case. I eventually had the set screw all the way out and put it back in 4 or 5 turns. Out of 40 shots, 3 locked back on the empty mag (with supersonic ammo). What do you think? A lighter buffer spring and or a lighter buffer weight? It fed flawlessly with the Winchester 145 gr fmj bullets but when I went to my reloads, I had feeding issues. The blunter nosed RMR bullets are getting jammed straight into the feed ramp. I am not sure what can be done to fix that.
I reloaded some 147 gr 9mm bullets from RMR in new Winchester cases. Previously, I had tried 25 gr H110 and it looked ok for the first 5 shots ( with the old barrel) but When I loaded up a mag wit them, I ended up with 3 blown primers and bulged cases. I pulled the rest and backed down to 24 gr. No pressure signs I can see but the speeds are still about 100 fps faster (with the new barrel) than the Winchester white box ammo.
I reloaded some 147 gr 9mm bullets from RMR in new Winchester cases. Previously, I had tried 25 gr H110 and it looked ok for the first 5 shots ( with the old barrel) but When I loaded up a mag wit them, I ended up with 3 blown primers and bulged cases. I pulled the rest and backed down to 24 gr. No pressure signs I can see but the speeds are still about 100 fps faster (with the new barrel) than the Winchester white box ammo.