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<blockquote data-quote="Mikecr" data-source="post: 1227602" data-attributes="member: 1521"><p>Since we're getting into cleaning, with abrasives, I'm compelled to bring in a point about it.</p><p>WE DON'T EVER WANT TO 'POLISH' A BORE.</p><p>Polishing is a dangerous misnomer for lapping. If you do polish a bore, copper fouling will instantly go through the roof.</p><p>And truly, the only way to fix a polished bore -is re-lapping. But if you got overzealous with your polishing, enough lapping to fix it, will also break it. The bore was just plain ruined.. I did this, I have a friend who did it, I read where others have..</p><p></p><p>- Don't ever use Flitz in a bore </p><p>- Don't ever use J-B 'BORE BRIGHT'</p><p></p><p>- Use J-B 'NON-EMBEDDING BORE CLEANING COMPOUND': <a href="http://www.brownells.com/gun-cleaning-chemicals/solvents-degreasers/bore-cleaning-paste/j-b-non-embedding-bore-cleaning-compound-prod1160.aspx" target="_blank">J-B® NON-EMBEDDING BORE CLEANING COMPOUND | Brownells</a></p><p>This, in frequent but rational use, will not harm the best in lapping, as it actually matches it.</p><p>When you feel a constrictive rough spot in a bore, break out the J-B and work on the spot for a minute. Done,, didn't hurt a thing.</p><p>If shooting moly, plan to J-B the first few inches, and soon you'll feel another spot ~10" down the bore. Then work both areas every time you clean. The ~10" area is where vaporized moly re-condenses, and re-bonds to itself. It takes a while, but this is the area that will kill accuracy, because once it's undeniable, it's too late...</p><p></p><p>Sounds like a lot of work, huh? YEP</p></blockquote><p></p>
[QUOTE="Mikecr, post: 1227602, member: 1521"] Since we're getting into cleaning, with abrasives, I'm compelled to bring in a point about it. WE DON'T EVER WANT TO 'POLISH' A BORE. Polishing is a dangerous misnomer for lapping. If you do polish a bore, copper fouling will instantly go through the roof. And truly, the only way to fix a polished bore -is re-lapping. But if you got overzealous with your polishing, enough lapping to fix it, will also break it. The bore was just plain ruined.. I did this, I have a friend who did it, I read where others have.. - Don't ever use Flitz in a bore - Don't ever use J-B 'BORE BRIGHT' - Use J-B 'NON-EMBEDDING BORE CLEANING COMPOUND': [url=http://www.brownells.com/gun-cleaning-chemicals/solvents-degreasers/bore-cleaning-paste/j-b-non-embedding-bore-cleaning-compound-prod1160.aspx]J-B® NON-EMBEDDING BORE CLEANING COMPOUND | Brownells[/url] This, in frequent but rational use, will not harm the best in lapping, as it actually matches it. When you feel a constrictive rough spot in a bore, break out the J-B and work on the spot for a minute. Done,, didn't hurt a thing. If shooting moly, plan to J-B the first few inches, and soon you'll feel another spot ~10" down the bore. Then work both areas every time you clean. The ~10" area is where vaporized moly re-condenses, and re-bonds to itself. It takes a while, but this is the area that will kill accuracy, because once it's undeniable, it's too late... Sounds like a lot of work, huh? YEP [/QUOTE]
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