DD MK18 begining to keyhole
I've got a Factory SBR DD MK18 that has 6k rounds through it, 5k of those suppressed, none of it full auto. Typical strings of rapid fire were around 6-7 rounds with time to cool off. Just recently (last 300 rounds) I began to see key-holing every 50 or so rounds. Ammunition has been brass cased 62gr freedom munitions the entire time. Changes the rifle has had are a Vltor A5 system with standard weight buffer (since the first round) and geissele G2S trigger. Suppressor is a Surefire SOCOM556-RC with 3 prong mount, mounted by professional gunsmithing shop to ensure it is centered.
I'd be surprised if the barrel was that worn out at this point. But wanted to reach out. A buddy speculated that it may be that the rounds are getting pushed in during feeding and this is causing the key-holing? Any input gentlemen?
DD MK18 begining to keyhole
Is the Freedom Munitions new or reman? I've had their stuff keyhole on my OAF Noveske that has less than 2k rounds through it. I think mine was reman, but even if it's new, that'd be my first guess. I'd also be surprised if the barrel is shot out. There are plenty of members here that will be able to give more advice, but many would probably recommend grabbing a few hundred rounds of some other factory ammo to try first.
ETA - good to see you on here, I just found your channel within the last month or so and am a fan.
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