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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Barrel break-in
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<blockquote data-quote="J E Custom" data-source="post: 1269723" data-attributes="member: 2736"><p>Yes . that is what I have seen and the barrel makers confirmed it. My visual examinations with the bore scope showed definite signs that the land edges were more rounded and no longer as sharp as the rest of the barrel. (This is the area of the most loading because of engraving). Barrel makers have confirmed this with air gaging and other high Tec measuring tools.</p><p></p><p>Abrasives are much harder than the barrel material and bullet jackets, so wear is accelerated in the first few inches. Hand lapping causes the same accelerated wear but the use of very fine grit slows this and ends up being more uniform over all surfaces. This is the reason some don't believe in lapping or break in at all. I like the quick results in accuracy and lack of fouling so I can start load development within 15 to 20 rounds with no change in performance.</p><p></p><p>I have nothing against the use of the fire lapping bullets on factory barrels that are beyond saving,</p><p>especially on a hunting rifle that may never see more than 4 or 500 rounds in its life. It is definitely easier than a conventional break in but the downside Is reduced accuracy and barrel life for those that need both.</p><p></p><p>So until something better (Not faster) comes along, I will continue to use the shoot and clean process that allows more control over the end results. Like so many other things in this sport, faster and easier is not always better.</p><p></p><p>Just My Opinion</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1269723, member: 2736"] Yes . that is what I have seen and the barrel makers confirmed it. My visual examinations with the bore scope showed definite signs that the land edges were more rounded and no longer as sharp as the rest of the barrel. (This is the area of the most loading because of engraving). Barrel makers have confirmed this with air gaging and other high Tec measuring tools. Abrasives are much harder than the barrel material and bullet jackets, so wear is accelerated in the first few inches. Hand lapping causes the same accelerated wear but the use of very fine grit slows this and ends up being more uniform over all surfaces. This is the reason some don't believe in lapping or break in at all. I like the quick results in accuracy and lack of fouling so I can start load development within 15 to 20 rounds with no change in performance. I have nothing against the use of the fire lapping bullets on factory barrels that are beyond saving, especially on a hunting rifle that may never see more than 4 or 500 rounds in its life. It is definitely easier than a conventional break in but the downside Is reduced accuracy and barrel life for those that need both. So until something better (Not faster) comes along, I will continue to use the shoot and clean process that allows more control over the end results. Like so many other things in this sport, faster and easier is not always better. Just My Opinion J E CUSTOM [/QUOTE]
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Barrel break-in
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