mattwill00
Lil-Rokslider
- Joined
- Apr 22, 2019
- Messages
- 215
So I got a brux barrel chambered by kelbly in 300 prc to put on an atlas tactical action. This was a “pre-fit” application if that makes a difference (action was already in my hands). I went ahead and started breaking in the barrel with a mild-ish load of retumbo under a 200 gr eldx with adg brass. At first I noticed a slight amount of pressure while chambering the virgin brass. I didn’t have to force the bolt down or anything but it’s definitely tight. My thought was maybe the adg brass was just a little large, and maybe the chamber a little small.
I went ahead and have shot 40ish rounds through the rifle with no signs of pressure at all. Brass prep was just chamfer/de-burr and running a mandrel to straighten the necks out. Last outing I had two round that refused to chamber. Also, the brass does not grow at all (in fact shrinks). Im beginning to think it’s the chamber job on this barrel. I’ll post a few numbers here. Let me know how these compare to your 300 prc brass and if I should be worried. Relatively new to putting rifles together btw. Have a go gauge coming from ptg, but I want to hear some other opinions here.
Unfired ADG:
Neck: 0.3335
Web: 0.5270
Base to datum: 2.194
OAL: 2.572
1x fired ADG:
Neck: 0.3415
Web: 0.5305
Base to datum: 2.1925
OAL: 2.571
Also here’s a pic of the base to datum on the rounds that don’t chamber.
I went ahead and have shot 40ish rounds through the rifle with no signs of pressure at all. Brass prep was just chamfer/de-burr and running a mandrel to straighten the necks out. Last outing I had two round that refused to chamber. Also, the brass does not grow at all (in fact shrinks). Im beginning to think it’s the chamber job on this barrel. I’ll post a few numbers here. Let me know how these compare to your 300 prc brass and if I should be worried. Relatively new to putting rifles together btw. Have a go gauge coming from ptg, but I want to hear some other opinions here.
Unfired ADG:
Neck: 0.3335
Web: 0.5270
Base to datum: 2.194
OAL: 2.572
1x fired ADG:
Neck: 0.3415
Web: 0.5305
Base to datum: 2.1925
OAL: 2.571
Also here’s a pic of the base to datum on the rounds that don’t chamber.