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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Need help troubleshooting 300 RUM pressure issue.
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<blockquote data-quote="Michael Eichele" data-source="post: 901523" data-attributes="member: 1007"><p>I've never used IOSSO so I won't comment. I've used a ton of JB and a little bit if Copper Cream. I have noticed Copper Cream if used too much acts like JB in 'polishing' the bore. I've been using it a little bit in a new bartlein barrel and have noticed the slight 'polished' streaks on the very edge of a couple of the lands developing. I'm done with the break in and much of the development is done so I'm done using any abrasives for a few hundred rounds now. </p><p></p><p>These cleaners take little effort to polish the surface of the bores and once you get the ball rolling, they polish even easier. 75RC or not. These really are a double edge sword. You need them for the worst carbon buildups but they polish the surface which causes copper fouling. Whatever the barrel maker does to get the finish to the right texture gets quickly destroyed. Basically, too much (a little) is like taking a frosted peice of glass and turning into a mirror.</p><p></p><p>I've in just a handful if cleanings taken barrels that showed virtually no copper fouling and turned them into serious copper magnets with abrasives.</p><p></p><p>Use sparingly.</p></blockquote><p></p>
[QUOTE="Michael Eichele, post: 901523, member: 1007"] I've never used IOSSO so I won't comment. I've used a ton of JB and a little bit if Copper Cream. I have noticed Copper Cream if used too much acts like JB in 'polishing' the bore. I've been using it a little bit in a new bartlein barrel and have noticed the slight 'polished' streaks on the very edge of a couple of the lands developing. I'm done with the break in and much of the development is done so I'm done using any abrasives for a few hundred rounds now. These cleaners take little effort to polish the surface of the bores and once you get the ball rolling, they polish even easier. 75RC or not. These really are a double edge sword. You need them for the worst carbon buildups but they polish the surface which causes copper fouling. Whatever the barrel maker does to get the finish to the right texture gets quickly destroyed. Basically, too much (a little) is like taking a frosted peice of glass and turning into a mirror. I've in just a handful if cleanings taken barrels that showed virtually no copper fouling and turned them into serious copper magnets with abrasives. Use sparingly. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Need help troubleshooting 300 RUM pressure issue.
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