It seems like it was deliberately set up like that. 005" on two sides, 180deg opposed from each other. The exit hole was out of round very very slightly, about. No measurable runout or misalignment once the exit was made actually round. The precision of manufacture is pretty surprising. On the upside, it looks like they're using CNC machines to build these brakes. So my 6XC barrel is getting cut for 1/2x28 instead of 5/8x24. 820" and while there was plenty of meat in the brake's shank to open it up to 5/8x24, I decided to keep it at 1/2x28 so I can roll it over to my 223's if I ever decide to. 020" total to be both minimum and maximum desirable brake to bullet clearance (.010" all the way around), so it's necessary to pay attention to things like that. In this case, the exit on the Cookie Cutter was advertised as. I was curious to know about the concentricity, runout and alignment of the exit to the shank because I planned to run the tolerances pretty snug. 223 version of the CC brake specifically so it'd have a small diameter exit that I wouldn't have to weld up and re-drill. You gotta admire a brake that works so well that a big guy like that can rock a machine gun and his fat don't even jiggle. So, any bets on how unpleasant this should end up being for the shooter and separately for bystanders? With 39.5gr of RL-23 it should be exciting. If it's too big we'll have to fill and drill. 260" exit hole is very snug and should help with efficiency but I wouldn't trust it to be centered perfectly so I'll have my smithy verify that. If not, i can still have my barrel set up with 1/2x28 threads. I checked and there should be, I'll have the 1/2x28 threads cut out and 5/8x24 threads put in. 223 version which, if there's enough meat to do it. Having the bullet channel with tight clearances I got the. Knowing that baffle surface area in the first baffle is the easiest source of reduced recoil impulse, I found the widest brake I could. I thought about going with the Hellfire or a Chode or Little Bastard but I don't like rear facing ports one bit.
That brake was ok but it's a 30cal brake.
243AI ran a JP tactical brake and was known to be an exceptionally loud monster even by the standards of the sport. The Strike Industries Cookie Cutter compensator is normally found on AR pistols and the occasional carbine but I decided to try one out on my 25.5" barreled 6XC.
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