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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Fire Lapping a Barrel
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<blockquote data-quote="J E Custom" data-source="post: 798575" data-attributes="member: 2736"><p>I personally Never recommend fire lapping is a last resort because it laps the throat and does very </p><p>little for the rest of the barrel.</p><p></p><p>The fact that the barrel shoots good the first couple of shots tells me that you need to do a good</p><p>break in.</p><p></p><p>Do a shoot, and clean after every shot for 20+ rounds and you will start seeing an improvement</p><p>on the fouling issue. It takes time and patience but is it worth the effort and improves the entire</p><p>bore not just the throat.</p><p></p><p>As you shoot, you should start to feel the improvement in the bore and the number of patches</p><p>to come clean should drop to 1 or 2.</p><p></p><p>It is not unusual for factory barrels to take more than a custom barrel so don't take a short cut </p><p>and start firing 2 or 3 shots and then cleaning. The purpose of the shoot and clean method is to</p><p>shoot 1 bullet in a clean bore and let it smooth the barrel out evenly end to end.</p><p></p><p>Fire lapping enlarges the bore at the throat and reduces bullet fit causing lower pressure and velocity.</p><p>hand lapping can do this if it is over done breaking it in only wears the high spots and fills in the </p><p>machine marks left from the rifling process.</p><p></p><p>Some custom barrels are very tight even after lapping because the barrel maker allowed for this</p><p>and reamed and rifled the barrel .000001 undersized.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 798575, member: 2736"] I personally Never recommend fire lapping is a last resort because it laps the throat and does very little for the rest of the barrel. The fact that the barrel shoots good the first couple of shots tells me that you need to do a good break in. Do a shoot, and clean after every shot for 20+ rounds and you will start seeing an improvement on the fouling issue. It takes time and patience but is it worth the effort and improves the entire bore not just the throat. As you shoot, you should start to feel the improvement in the bore and the number of patches to come clean should drop to 1 or 2. It is not unusual for factory barrels to take more than a custom barrel so don't take a short cut and start firing 2 or 3 shots and then cleaning. The purpose of the shoot and clean method is to shoot 1 bullet in a clean bore and let it smooth the barrel out evenly end to end. Fire lapping enlarges the bore at the throat and reduces bullet fit causing lower pressure and velocity. hand lapping can do this if it is over done breaking it in only wears the high spots and fills in the machine marks left from the rifling process. Some custom barrels are very tight even after lapping because the barrel maker allowed for this and reamed and rifled the barrel .000001 undersized. J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Fire Lapping a Barrel
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