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The Range
Rifle & Shotgun Discussion
16" .308 Ruger American
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<blockquote data-quote="swampratt" data-source="post: 3294147" data-attributes="member: 15054"><p>I think my gun may have been abused by the previous owner or just a fail at the factory.</p><p>I could not get over the odd marks on my fired brass ..like the case mouth was getting into the rifling on one section of the case mouth.</p><p></p><p>I cleaned the snot out of my gun again and made sure no fouling or copper was in the chamber or barrel then got my scope out and took a look.</p><p>Looks like the end of the chamber where the case mouth would stop and rifling would start is messed up in 1 section.</p><p></p><p>Looks like instead of the squared off lip the end of the chamber has a taper in one section.</p><p>That would explain the rifling groove marks on the case mouth. Case when fired is flowing into this area.</p><p>I would need to trim my brass .030" shorter to avoid the marks.</p><p>I could use .243 cases necked up to .308..This will give me a short case. Or trim the cases I have now much shorter and retest.</p><p></p><p>Still have the bullet starting out crooked possibly. Test and see.</p><p></p><p>A picture or 2 of what i seen with the scope.</p><p>I turned the camera to make sure it was not a shadow issue and it is not a shadow.[ATTACH=full]147033[/ATTACH] [ATTACH=full]147034[/ATTACH]</p></blockquote><p></p>
[QUOTE="swampratt, post: 3294147, member: 15054"] I think my gun may have been abused by the previous owner or just a fail at the factory. I could not get over the odd marks on my fired brass ..like the case mouth was getting into the rifling on one section of the case mouth. I cleaned the snot out of my gun again and made sure no fouling or copper was in the chamber or barrel then got my scope out and took a look. Looks like the end of the chamber where the case mouth would stop and rifling would start is messed up in 1 section. Looks like instead of the squared off lip the end of the chamber has a taper in one section. That would explain the rifling groove marks on the case mouth. Case when fired is flowing into this area. I would need to trim my brass .030" shorter to avoid the marks. I could use .243 cases necked up to .308..This will give me a short case. Or trim the cases I have now much shorter and retest. Still have the bullet starting out crooked possibly. Test and see. A picture or 2 of what i seen with the scope. I turned the camera to make sure it was not a shadow issue and it is not a shadow.[ATTACH=full]147033[/ATTACH] [ATTACH=full]147034[/ATTACH] [/QUOTE]
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16" .308 Ruger American
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