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Rifles, Reloading, Optics, Equipment
Gunsmithing
Cooper and carbon fouling.
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<blockquote data-quote="Teri Anne" data-source="post: 2398626" data-attributes="member: 118816"><p>I had the same issue with my Browning 300 WM, I could not get it to group no matter what. After 100 rounds and still no success I bore scoped the barrel and it was copper fouled from chamber to muzzle. The rifling looked like a rasp file. Spent hours removing the copper and tried again. This time the fouling was not as bad but still there. Cleaned the copper again and tried again. Noted the groups starting to shrink but also noted that there was still copper fouling. Again cleaned the copper out of the barrel and tried again. I could go on and on, but the end result is that the rifle shoots sub MOA groups with 180 gr Federal Premium and where are only copper smudges here and there. It took all total about 260 rounds fired before things kind of normalized out. I kept at it and it's a pretty good shooting rifle now. Don't give up, clean out the copper fire some rounds and clean the copper until it doesn't foul out anymore. The end justifies the means.</p></blockquote><p></p>
[QUOTE="Teri Anne, post: 2398626, member: 118816"] I had the same issue with my Browning 300 WM, I could not get it to group no matter what. After 100 rounds and still no success I bore scoped the barrel and it was copper fouled from chamber to muzzle. The rifling looked like a rasp file. Spent hours removing the copper and tried again. This time the fouling was not as bad but still there. Cleaned the copper again and tried again. Noted the groups starting to shrink but also noted that there was still copper fouling. Again cleaned the copper out of the barrel and tried again. I could go on and on, but the end result is that the rifle shoots sub MOA groups with 180 gr Federal Premium and where are only copper smudges here and there. It took all total about 260 rounds fired before things kind of normalized out. I kept at it and it's a pretty good shooting rifle now. Don't give up, clean out the copper fire some rounds and clean the copper until it doesn't foul out anymore. The end justifies the means. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
Cooper and carbon fouling.
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