I am at my wits end.
I am puzzled about my new 6br, and my new brass.
This gun is brand new , with brand new brass. Brand new Krieger 1/8 twist.
It goes across the course
My problem is in the rapid fire stage with the new gun/ brass. When shooting rapids about 1 in 5 or sometimes 2 in 5 the bolt is very hard, or gummy to lift. Distracting. Disconcerting.
This effect started with NEW brass, and continues.
The load is Varget 28 grains, Lapua brass, CCI 450s, and SMK 107s'.
I am .025 off the lands. Was new brass.
I am halfway through the second firing of the brass.
Tried 29 grains. Not good.
Tried polishing the chamber.
Went back to the 'smith, and we went from 0.00 headspace to 0.0025 headspace to get a little room on the go gauge
No change. Everyone else is running 30 grains. This has a new Krieger barrel 30" finish length, normal groove/bore. Chamber is .2718 on the chamber sheet. (PTGReamer ).
Sizedfull length on Forster full length sizer. Drops right into a Wilson Cartridge gauge.
Fired case .271. loaded case .268
The gun shoots great regardless of me fiddling with things.
Must I shoot 26 to 27 grains.................... ?
Regards
Michael Torre
Southwestern Virginia
I am puzzled about my new 6br, and my new brass.
This gun is brand new , with brand new brass. Brand new Krieger 1/8 twist.
It goes across the course
My problem is in the rapid fire stage with the new gun/ brass. When shooting rapids about 1 in 5 or sometimes 2 in 5 the bolt is very hard, or gummy to lift. Distracting. Disconcerting.
This effect started with NEW brass, and continues.
The load is Varget 28 grains, Lapua brass, CCI 450s, and SMK 107s'.
I am .025 off the lands. Was new brass.
I am halfway through the second firing of the brass.
Tried 29 grains. Not good.
Tried polishing the chamber.
Went back to the 'smith, and we went from 0.00 headspace to 0.0025 headspace to get a little room on the go gauge
No change. Everyone else is running 30 grains. This has a new Krieger barrel 30" finish length, normal groove/bore. Chamber is .2718 on the chamber sheet. (PTGReamer ).
Sizedfull length on Forster full length sizer. Drops right into a Wilson Cartridge gauge.
Fired case .271. loaded case .268
The gun shoots great regardless of me fiddling with things.
Must I shoot 26 to 27 grains.................... ?
Regards
Michael Torre
Southwestern Virginia