What to use for barrel break-in?


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RM
October 27, 2005, 12:36 PM
What products do THR members recommend for breaking in a new SS barrel. Should I use a regular bore solvent like Gunscrubber? A copper solvent? Or do I need both? Any specific product recommendations would also be appreciated. Thank you.

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rbernie
October 27, 2005, 12:58 PM
I usueally break in a new barrel by carefully applying periodic high-pressure abradement treatments via high speed copper-clad lead based occlusions.

Werewolf
October 27, 2005, 01:02 PM
Barrel breakin is one of those subjects where 1/2 the folks say, HUH(?) barrel breakin, waste of time and the other half do the shoot 1 clean, shoot 1 clean thingy religiously.

I fall into the 1st camp myself so to answer your question what I recommend for barrel breakin is copper. The kind that comes attached to FMJ bullets.

Just the shoot the sucker and don't sweat it unless the gun in question is one of those high dollar rifles with a cryogenically treated barrel etc etc etc.

Zak Smith
October 27, 2005, 01:24 PM
If there is any point to barrel break-in, it is to smooth out the surface of the bore while not allowing much copper build-up. This is why the method is usually similar to "shoot 1 / clean for 5, shoot 2 / clean for 10, etc". If there are rough spots in the bore, you make sure to get the copper fouling out/off before you continue.

The best copper remover I have found to date is KG-12, which contains no ammonia and seems to get everything out in about 5x fewer strokes than anything else I've tried.

USSR
October 27, 2005, 01:28 PM
What products do THR members recommend for breaking in a new SS barrel. Should I use a regular bore solvent like Gunscrubber? A copper solvent? Or do I need both? Any specific product recommendations would also be appreciated. Thank you.

RM,

Since the purpose of barrel break-in is to remove the copper that is being laid down in a new barrel in the initial shots, I would use a solvent known to remove copper such as Butch's, Sweets, or the excellent Montana Extreme 50BMG solvent. My routine, and the one that Krieger recommends, is to clean between each of the first 5 shots, shoot 3 then clean, and shoot 5 then clean. While this works with a high quality custom barrel, additional break-in time may be required for lesser grade barrels.

Don

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