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Tennessee Gun Owners Forums
Rifles
Accuracy Issues
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<blockquote data-quote="varminthunter" data-source="post: 5313238" data-attributes="member: 8705"><p>To begin this, I recently purchased a new AR15 upper. This is a 24" SS Bull barrel with a 1:8 twist. I cleaned the barrel before shooting and when through the normal shot-clean for the first 25 rounds and then after every 25 rounds. I have fired almost 150 rounds through this barrel and so far the best accuracy I have seen is a 3" group at 100 yards. I have tried 55gr, 62gr and 75gr rounds, all producing approx. the same results give or take a 1/2" +-. These round have been everything from FMJ, Soft Point and Hollow Point rounds.</p><p></p><p>I ran my borescope down the barrel and to me it looks like rust spots all up and down the barrel, but I'm not 100% sure. What are your opinions of the attached borescope images. Some of this maybe copper fouling, so I think I will pickup some cleaner for this to clean the barrel.</p><p></p><p>I should mention that I purchased this upper through M&A Parts Inc.</p></blockquote><p></p>
[QUOTE="varminthunter, post: 5313238, member: 8705"] To begin this, I recently purchased a new AR15 upper. This is a 24" SS Bull barrel with a 1:8 twist. I cleaned the barrel before shooting and when through the normal shot-clean for the first 25 rounds and then after every 25 rounds. I have fired almost 150 rounds through this barrel and so far the best accuracy I have seen is a 3" group at 100 yards. I have tried 55gr, 62gr and 75gr rounds, all producing approx. the same results give or take a 1/2" +-. These round have been everything from FMJ, Soft Point and Hollow Point rounds. I ran my borescope down the barrel and to me it looks like rust spots all up and down the barrel, but I'm not 100% sure. What are your opinions of the attached borescope images. Some of this maybe copper fouling, so I think I will pickup some cleaner for this to clean the barrel. I should mention that I purchased this upper through M&A Parts Inc. [/QUOTE]
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