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Over the last couple of years we have had some real good runs on lapping, new bore breakin, etc. The following are a couple of statements I would like your opinion on.
"An Abrasive's cutting power is proportional to the force applied against it. for example, 600 grit abrasive is a polishing compound when used on a cloth buffer and will create a brilliant lustrous finish. On a very yight-fitting patch, it's slightly more abrasive to the bore than jacketed bullets, yet it will remove softer lead, powder and jacket fouling and leave an unbelievably clean, bright finish. The abrasive crystals in J-B bore paste are only about a quarter the size of thise in the LBT compound, making it an ecen finer polishing agent when used on a patch. a patch is flexable, applies relatively little pressure to individual abrasive crystals and slides over imperfections such as pits, scratches, forcing cone tapers, etc., leaving a smooth, rounded surface in its wake. When those same compounds are used on a lead lap, their cutting power is greatly enhanced. Consequently, the finish they producewill be slightly rough.Futhermore, the lead retains its shape, fitting diameters of the bore, leveling off high spots, but leaving low areas untouched"
And.......
"To improve cast-bullet performance in rough bores, many authorities recommend shooting several hundred jackete-bullet loads through the bore, cleaning frequently to minimize the buildup of copper fouling. because jacket material is abrasive, that approach works fairly well on bores which require only a small amount of smoothing It can remove small constrictions in magnum revolver forcing cones, too. As methods go, however, that one is both expensive and time-consuming. Worst of all, it can't correct severe diamensional variations."
It goes on to say that removing no more that .0001" of the bore is best and to remove as much as .0005" is counter productive.
Best Regards, James
"An Abrasive's cutting power is proportional to the force applied against it. for example, 600 grit abrasive is a polishing compound when used on a cloth buffer and will create a brilliant lustrous finish. On a very yight-fitting patch, it's slightly more abrasive to the bore than jacketed bullets, yet it will remove softer lead, powder and jacket fouling and leave an unbelievably clean, bright finish. The abrasive crystals in J-B bore paste are only about a quarter the size of thise in the LBT compound, making it an ecen finer polishing agent when used on a patch. a patch is flexable, applies relatively little pressure to individual abrasive crystals and slides over imperfections such as pits, scratches, forcing cone tapers, etc., leaving a smooth, rounded surface in its wake. When those same compounds are used on a lead lap, their cutting power is greatly enhanced. Consequently, the finish they producewill be slightly rough.Futhermore, the lead retains its shape, fitting diameters of the bore, leveling off high spots, but leaving low areas untouched"
And.......
"To improve cast-bullet performance in rough bores, many authorities recommend shooting several hundred jackete-bullet loads through the bore, cleaning frequently to minimize the buildup of copper fouling. because jacket material is abrasive, that approach works fairly well on bores which require only a small amount of smoothing It can remove small constrictions in magnum revolver forcing cones, too. As methods go, however, that one is both expensive and time-consuming. Worst of all, it can't correct severe diamensional variations."
It goes on to say that removing no more that .0001" of the bore is best and to remove as much as .0005" is counter productive.
Best Regards, James