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Buildup of Copper
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<blockquote data-quote="MW204" data-source="post: 2560840" data-attributes="member: 118876"><p>My son-in-law bought a new air gauged barrel from Shilen in a 300 WSM, threaded and chambered. I set the headspace on it and he's fired it 3 times. Since then I bought a borescope and boy did his barrel have a lot of copper buildup in it. I can't believe I didn't take a pic then, but he's been extremely busy at work, with no one willing to work, so I decided to clean his rifle for him. </p><p>I gave the rifle what I would call a good cleaning before using the bore scope again. The barrel cleaned up pretty good imo, but there were 3 spots that still had copper in it and it took a lot of cleaning to get the remaining copper out of it. </p><p>I shot the rifle 2 times and ran the borescope again and imo it had a lot of copper in it just after 2 shots, plus no matter what cleaning process I used it left a lot of white spots, which I'm guessing is part of the patch that is being pulled off. </p><p>My questions are. </p><p>1. does a new barrel actually copper up this fast? </p><p>2. with those 3 spots having copper buildup in them does that mean the barrel has a void in the rifling? </p><p>3. are the white spots patch material that is being ripped off by the rifling? </p><p></p><p>I'll try to line the pics up as I took them and then the videos. (working on the videos)</p></blockquote><p></p>
[QUOTE="MW204, post: 2560840, member: 118876"] My son-in-law bought a new air gauged barrel from Shilen in a 300 WSM, threaded and chambered. I set the headspace on it and he's fired it 3 times. Since then I bought a borescope and boy did his barrel have a lot of copper buildup in it. I can't believe I didn't take a pic then, but he's been extremely busy at work, with no one willing to work, so I decided to clean his rifle for him. I gave the rifle what I would call a good cleaning before using the bore scope again. The barrel cleaned up pretty good imo, but there were 3 spots that still had copper in it and it took a lot of cleaning to get the remaining copper out of it. I shot the rifle 2 times and ran the borescope again and imo it had a lot of copper in it just after 2 shots, plus no matter what cleaning process I used it left a lot of white spots, which I'm guessing is part of the patch that is being pulled off. My questions are. 1. does a new barrel actually copper up this fast? 2. with those 3 spots having copper buildup in them does that mean the barrel has a void in the rifling? 3. are the white spots patch material that is being ripped off by the rifling? I'll try to line the pics up as I took them and then the videos. (working on the videos) [/QUOTE]
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