12-13-2020, 06:00 AM
I hate to be the negative post in here, but I'm on my third MGM barrel in 6.5 PRC.
First barrel, 22" blued 1:8 twist. Problem, bad chamber with excessive headspace and badly fluted from reamer chattering.
MGM replaced the first with the second barrel. 24" blued 1:8 twist, threaded 5/8×24 for my suppressor. Barrel lost accuracy at 201 rounds. Problem, excessive fire cracking extending 10" past the throat. Headspace was 10 thou bigger than factory ammo from the get go, resulting in case head separations after two reloads. MGM theorized that the metallurgy was bad on it.
MGM replaced barrel two with barrel three. Barrel three is also 24", but 7.5 twist and in stainless steel with 5/8×24 threaded. Headspave is tighter on this barrel at only plus 5 thou over a factory round, so a little better. Only have 8 shots through it so far as factory ammo is super hard to find right now.
The plus side, MGM has been super great on getting the first two barrels taken care of.
First barrel, 22" blued 1:8 twist. Problem, bad chamber with excessive headspace and badly fluted from reamer chattering.
MGM replaced the first with the second barrel. 24" blued 1:8 twist, threaded 5/8×24 for my suppressor. Barrel lost accuracy at 201 rounds. Problem, excessive fire cracking extending 10" past the throat. Headspace was 10 thou bigger than factory ammo from the get go, resulting in case head separations after two reloads. MGM theorized that the metallurgy was bad on it.
MGM replaced barrel two with barrel three. Barrel three is also 24", but 7.5 twist and in stainless steel with 5/8×24 threaded. Headspave is tighter on this barrel at only plus 5 thou over a factory round, so a little better. Only have 8 shots through it so far as factory ammo is super hard to find right now.
The plus side, MGM has been super great on getting the first two barrels taken care of.