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Rifles, Reloading, Optics, Equipment
Gunsmithing
Burr in chamber/pressure issue
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<blockquote data-quote="RocketDog" data-source="post: 935584" data-attributes="member: 56408"><p>I bought a Ruger M77 mark ii 7rem mag about a year ago. I wasn't into reloading at the time so was shooting factory ammo and tossing the brass when I was finished.</p><p></p><p>I started getting into reloading in the fall and that's when I noticed that my brass had some pretty good scratches almost the full length. I was also having a hard time opening the bolt, not so much with lifting the bolt but more with extracting. I took the bolt off and shined a flash light down and could see a burr in the chamber. I bought some flitz bore polish and drilled and tapped a new piece of brass, threaded a rod to the end of it and gently worked the chamber with a light coat of polish on the case. I cleaned out the polish and from what I can see the burr is gone and the chamber looks clean and smooth. </p><p></p><p>Also some of my primers were flattened a little even tho I was well under max load for powder and the bullets were set just over factory spec. Would the burr cause pressure issue on the casing to cause that? I assuming the that bolt not opening was also caused from the burr?</p><p></p><p>Thanks</p></blockquote><p></p>
[QUOTE="RocketDog, post: 935584, member: 56408"] I bought a Ruger M77 mark ii 7rem mag about a year ago. I wasn't into reloading at the time so was shooting factory ammo and tossing the brass when I was finished. I started getting into reloading in the fall and that's when I noticed that my brass had some pretty good scratches almost the full length. I was also having a hard time opening the bolt, not so much with lifting the bolt but more with extracting. I took the bolt off and shined a flash light down and could see a burr in the chamber. I bought some flitz bore polish and drilled and tapped a new piece of brass, threaded a rod to the end of it and gently worked the chamber with a light coat of polish on the case. I cleaned out the polish and from what I can see the burr is gone and the chamber looks clean and smooth. Also some of my primers were flattened a little even tho I was well under max load for powder and the bullets were set just over factory spec. Would the burr cause pressure issue on the casing to cause that? I assuming the that bolt not opening was also caused from the burr? Thanks [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
Burr in chamber/pressure issue
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