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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Clean bore vs. fouled bore for 1st shot accuracy
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<blockquote data-quote="Mikecr" data-source="post: 670453" data-attributes="member: 1521"><p>You can't just 'try' coated bullets with any meaning. </p><p>It takes a plan and management to succeed with.</p><p></p><p>You can google tungsten disulphide. I picked up some 'technical grade' at RoseMill ~25yrs ago to begin. I doubt I've used a 1/4lb with thousands of bullets.</p><p>Both my bullets and bores are dry coated with WS2.</p><p>Bullets are coated as they are with moly or boron.</p><p>My cleaned, alcohol washed, dry bores are dry burnished with a bore mop which is stored in a tube with coated BBs and a pinch of WS2 here & there.</p><p></p><p>I suppose this powder fills bore crevices that copper would otherwise. I could fire 100rounds and manage only a single slight blue tinting of a patch. So copper is totally out of the picture with it.</p><p>It also cleans completely out of the bore easily, and it doesn't wipe/build on itself to constriction(both unlike moly). It's slippery as pig snot, but I don't know that it affects overall velocity much(like moly). I load develop with it, calibrate my QuickLoad using it over a chrono, and I haven't seen any surprising velocities yet.</p><p></p><p>I've donated barrels to science and found that even with WS2, if your bore finish is extreme one way or the other(polished/rough), copper fouling will still exist.</p><p>I have fire-lapped to break-in every barrel since, factory or aftermarket alike. And I also watch with a borescope to manage their condition.</p><p></p><p>But if you've got a good aftermarket barrel, you may not NEED to consider any of this.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 670453, member: 1521"] You can't just 'try' coated bullets with any meaning. It takes a plan and management to succeed with. You can google tungsten disulphide. I picked up some 'technical grade' at RoseMill ~25yrs ago to begin. I doubt I've used a 1/4lb with thousands of bullets. Both my bullets and bores are dry coated with WS2. Bullets are coated as they are with moly or boron. My cleaned, alcohol washed, dry bores are dry burnished with a bore mop which is stored in a tube with coated BBs and a pinch of WS2 here & there. I suppose this powder fills bore crevices that copper would otherwise. I could fire 100rounds and manage only a single slight blue tinting of a patch. So copper is totally out of the picture with it. It also cleans completely out of the bore easily, and it doesn't wipe/build on itself to constriction(both unlike moly). It's slippery as pig snot, but I don't know that it affects overall velocity much(like moly). I load develop with it, calibrate my QuickLoad using it over a chrono, and I haven't seen any surprising velocities yet. I've donated barrels to science and found that even with WS2, if your bore finish is extreme one way or the other(polished/rough), copper fouling will still exist. I have fire-lapped to break-in every barrel since, factory or aftermarket alike. And I also watch with a borescope to manage their condition. But if you've got a good aftermarket barrel, you may not NEED to consider any of this. [/QUOTE]
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Clean bore vs. fouled bore for 1st shot accuracy
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