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Old 03-18-2009 | 07:44 AM
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driftrider
Nontypical Buck
 
Joined: Feb 2003
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From: Coralville, IA. USA
Default RE: moly-coated bullets


ORIGINAL: stalkingbear

What you do is trade copper fouling for moly buildup. I tried it and decided I didn't like it as you still have to clean the moly out of the bore. The BEST thing is to have a polished or hand lapped bore, which will GREATLY reduce fouling in all cases.
Yep, and it's also my understanding that once you shoot moly coated bullets, you can't easily go back to uncoated bullets because of the moly buildup in the bore. The moly buildup is also supposedly nearly impossible to get out once deposited.

My suggestion would be to ditch any idea of using moly coated bullets. Cleaning isn't a big problem if you start out cleaning frequently, like cleaning between every group while the barrel is cooling. A frequent cleaning regimen early in the barrels life will, in my experience, lead to less fouling and copper buildup later as the barrel "breaks in". Also, you don't need to get too obsessed with getting every speck of copper from the bore. Some folks scrub for hours with Sweets 7.62 until there is no blue at all, and i've done it a couple times myself, only to find that my accuracy DECREASED afterward until I had fired a dozen or so rounds through the barrel (I'm talking about factory barrels, now, not top-shelf custom barrels that are hand-lapped to a mirror finish). Now my cleaning regimen is to run a solvent soaked patch (Birchwood Caseys Bore Scrubber usually) through the bore while the barrel is still warm. Wait 3-5 minutes, then scrub 10 strokes with a bronze bore brush, then dry patches until the patches show very little to no grey. I've found that this procedure takes out all the major crud without taking out the pore filling "base layer" of fouling that all rough factory barrels get and seem to need for consistant accuracy. If I start seeing excessive copper in the bore and accuracy is deteriorating despite the above cleaning regimen, then I'll use Barnes CR-10 to to do a deep cleaning, knowing that I'll have to recondition the bore at the range to get accuracy back afterward.

Mike

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