Looking back at the original MMC thread, it seems several forum members bought the barrels. It would be nice if more would chime in if they've had any issues.
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Looking back at the original MMC thread, it seems several forum members bought the barrels. It would be nice if more would chime in if they've had any issues.
I purchased one of Ned's reamers to use on four barrels and then sold it for almost what I had in it.
I re-cleaned this barrel with some bronze brushing, and also some Copper remover. (Bore Tech) The patches didn't turn very green at all. A little copper fouling, but nothing like a bolt gun.
I used some magnified glasses and light and can kinda see that the lands are just roughed up from normal (i guess) firing.
I'm back to the Reamer at this point. I think that my higher use barrels are the same, AND.. at some point the colts will even get worn to where the gauge sticks at the starting lands.
I’ve got one. It seems fine. M855, XM855, some rando stuff. I’ll try to remember to bring it out and shoot something stupid through it soon.
Mark, have you heard of “Final Finish” ammo? I think Tubbs or Zedecker sells it on a website. Its an abrasive impregnated projectile claimed to “fire hone” or something like that. I have no idea if it’ll work, or destroy your gun or what; just curious if people try this as a remedy. There’s also some sort of abrasive paste. We could be deep into bad idea territory though.
I’d personally start with Ned’s gauge, then reamer if it fails, then back to head-scratching or doing something drastic like lighter ammo.
I thought of those things.. Steel jacketed ammo, Even buying PMC Bronze to run in it. If it were the only barrel that the pin stuck in at the first inch of the chamber, I'd explore those deeper. But almost all of my older barrels stick.
Thinking bore scope and/or reamer is the next step.
I got a couple of the rods from McMaster a week or so ago, didn't test until yesterday because I was waiting to smooth the sharp edges. I mean, what the heck, it's a cheap tool. The rod will drop right through all 4 barrels of my current shooters. They are the MMC, Spikes 16", Colt 16" and Brownells 11.5". The Spikes has the highest round count, then the MMC, then Colt, then Brownells. I'll have to check my son's then my son-in-law's.
I put them in my drill press, let it run on a slow speed. Then I used a dremel type grinder and a round disc grinding stone, put it on the slowest speed, and used very light pressure on the edge with the flat part of the stone. It took several minutes, and I got nice smooth 45* angle. Not wide, just enough to see.
Thanks, guys. I may work on that on Sunday. Curious if that will make a difference in pass thru. Although as it is, the Colts still pass the pin completely. So there's some real differences between the barrels.
I'm really interested to see if at some point the lands on the 6920 get roughed up to where the pin won't pass. So I man only chamfer one end of the pin for now.