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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Copper fouling location in barrel
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<blockquote data-quote="Tac-O" data-source="post: 2271943" data-attributes="member: 109994"><p>I've got a pretty new barrel I'm trying to figure out the fouling issue in. It seems to foul very heavily with Speer and Hornady cup and core bullets. After 20 rounds, it's heavy enough that I feel the need to clean it. I'm also getting bad flier in every group of 4 shots that otherwise would be a stellar group. So, I think it's the fouling but not sure. </p><p></p><p>Anyway, looking through the borescope got me wondering about what we might learn from the location of the fouling in the bore. </p><p></p><p>In my barrel, the throat to probably the first 12 inches or so of bore has no copper. Then the copper fouling starts and gradually gets heavier, to where it almost looks gloopy near the muzzle. This is a nice, smooth mullerworks barrel and the chambering and throating job is rough. I've got probably 150 rounds through it. Performed a break in and also smoothed the throat a bit by lapping it. </p><p></p><p>So if the barrel is smooth but the throat and leade is rough, will that strip the copper off the jacket and just deposit it further down the barrel? Does the fouling description above indicate it's the rough throat and leade?</p></blockquote><p></p>
[QUOTE="Tac-O, post: 2271943, member: 109994"] I've got a pretty new barrel I'm trying to figure out the fouling issue in. It seems to foul very heavily with Speer and Hornady cup and core bullets. After 20 rounds, it's heavy enough that I feel the need to clean it. I'm also getting bad flier in every group of 4 shots that otherwise would be a stellar group. So, I think it's the fouling but not sure. Anyway, looking through the borescope got me wondering about what we might learn from the location of the fouling in the bore. In my barrel, the throat to probably the first 12 inches or so of bore has no copper. Then the copper fouling starts and gradually gets heavier, to where it almost looks gloopy near the muzzle. This is a nice, smooth mullerworks barrel and the chambering and throating job is rough. I've got probably 150 rounds through it. Performed a break in and also smoothed the throat a bit by lapping it. So if the barrel is smooth but the throat and leade is rough, will that strip the copper off the jacket and just deposit it further down the barrel? Does the fouling description above indicate it's the rough throat and leade? [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Copper fouling location in barrel
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