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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Tubb Final Finish
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<blockquote data-quote="Michael Eichele" data-source="post: 595787" data-attributes="member: 1007"><p>Gene,</p><p></p><p>Think of new bores from custom shops as not polished but finished. Lapping removes tool marks and make the bore uniform. They use grits SEVERAL times rougher than the grit of JB, Flitz or Iosso. There is a reason for that. You want you bore 'smooth' but NOT polished. Polished increases copper fouling due to the increased surface area and subsequent friction. </p><p></p><p>Yes, some of the top match shooters use JB. They also have lots of barrels at their disposal. Many other top shooters admit that JB increases fouling due to polishing. They admit it cleans copper and fouling fast but also breaths life to more fouling.</p><p></p><p>If you doubt this, take a new barrel, break it in, develop some loads, note how easy it is to clean and then start using JB in your cleaning regimine. You will notice how quickly and badly your 'new' barrel will start copper foul.</p></blockquote><p></p>
[QUOTE="Michael Eichele, post: 595787, member: 1007"] Gene, Think of new bores from custom shops as not polished but finished. Lapping removes tool marks and make the bore uniform. They use grits SEVERAL times rougher than the grit of JB, Flitz or Iosso. There is a reason for that. You want you bore 'smooth' but NOT polished. Polished increases copper fouling due to the increased surface area and subsequent friction. Yes, some of the top match shooters use JB. They also have lots of barrels at their disposal. Many other top shooters admit that JB increases fouling due to polishing. They admit it cleans copper and fouling fast but also breaths life to more fouling. If you doubt this, take a new barrel, break it in, develop some loads, note how easy it is to clean and then start using JB in your cleaning regimine. You will notice how quickly and badly your 'new' barrel will start copper foul. [/QUOTE]
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