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Rifles, Reloading, Optics, Equipment
Reloading
25 prc issue
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<blockquote data-quote="aaronraad" data-source="post: 2594126" data-attributes="member: 34119"><p>I'd agree with checking for copper fouling, especially if you had 1" groups and they disappeared. The copper will be pretty evident as streaks when looking from the muzzle unless carbon has layered over again.</p><p></p><p>I've brought back a couple of barrels (SS & Cr-Mo) with Bore Tech Copper Remover and nylon brushes to bare metal, then broke them back in again. Had trouble cracking the carbon layer but flooded them with aerosol carby cleaner and that moved everything faster than boiling water.</p><p></p><p>If you get a carbon layer down again first after stripping back to bare metal, it's a pretty good sign your barrel is reasonably smooth. If you get copper layers again you're probably dealing with roughness, or a significant imperfection and JB Bore Bright is worth trying then. Use a patch to ID rough or tight sections in the bore and work those sections first with JB BB, no point lapping out more than you have to. You might need to flood the barrel with carby cleaner or electrical contact cleaner or similar to make sure you get all the JB BB out again.</p></blockquote><p></p>
[QUOTE="aaronraad, post: 2594126, member: 34119"] I'd agree with checking for copper fouling, especially if you had 1" groups and they disappeared. The copper will be pretty evident as streaks when looking from the muzzle unless carbon has layered over again. I've brought back a couple of barrels (SS & Cr-Mo) with Bore Tech Copper Remover and nylon brushes to bare metal, then broke them back in again. Had trouble cracking the carbon layer but flooded them with aerosol carby cleaner and that moved everything faster than boiling water. If you get a carbon layer down again first after stripping back to bare metal, it's a pretty good sign your barrel is reasonably smooth. If you get copper layers again you're probably dealing with roughness, or a significant imperfection and JB Bore Bright is worth trying then. Use a patch to ID rough or tight sections in the bore and work those sections first with JB BB, no point lapping out more than you have to. You might need to flood the barrel with carby cleaner or electrical contact cleaner or similar to make sure you get all the JB BB out again. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
25 prc issue
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