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breaking in a barrel

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Unread 04-18-2011, 10:32 AM
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Join Date: May 2008
Location: South of Canada and North of Wyoming
Posts: 6,068
Re: breaking in a barrel

Originally Posted by Jinx-) View Post
All of the break in procedures yield one thing, get bore polished, it can be done by firing bullets through it or just polishing it with bore paste, the end result is smooth surface, where fouling want get stuck.
You want to be real careful about trying to polish your bore with lapping or polishing compounds. It is possible to get a bore too polished. I've used Montana Xtreme Copper cream during break-in and seems to work OK. But I would avoid getting carried away with abrasive polishing pastes.
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Unread 04-18-2011, 11:14 AM
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Join Date: Aug 2009
Posts: 693
Re: breaking in a barrel

Yes be very careful with J-B compound, make sure you get blue one and I only would recommend using it once to start polishing process, the rest of the polishing I use KG-2 bore restore, from manufactures website quote: "KG-2 was originally developed to maintain the bore integrity of sniper rifles. Unlike most other mechanical products, KG-2 contains no ammonia and is a 1200-1400grit soft compound to remove copper and lead, while leaving the integrity of the bore. In most cases KG-2 will perform exceptionally well in removing copper and lead with quality patches, however, in some cases, nylon brushes are recommended. Based on the theory of removing the copper and lead from the lands and groves only, while simply smoothing over the impregnated copper and lead in the micro-fractures of the bore, KG-2 will help reduce the need for fouling shots and it is recommended and used by SWAT and sniper teams. KG-2 is an ideal product for fire polishing (A technique producing a finer finish than Fire Lapping)."

also I would consider recommendations by David Tubb about barrel break in, if you would like to read it its in PDF format http://www.davidtubb.com/tcom_images/downloads/break_in_article_new.pdf
its whole different idea of polishing barrel, I think I might give it a try myself...

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Unread 04-18-2011, 01:31 PM
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Join Date: Apr 2011
Location: Yuma, AZ
Posts: 13
Re: breaking in a barrel

Here is a good article (IMO) on breaking in a barrel:

Barrel Break-in

If you are undecided on whether or not it will benefit you, then go ahead and follow a break-in procedure. It sure won't hurt. I break in every new rifle I purchase. I don't worry about used rifles as much but it depends on how "used" the rifle is. I use a borescope to determine my personal level of break-in satisfaction.
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