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Hunting
The Basics, Starting Out
Barrel burnout
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<blockquote data-quote="Lefty7mmstw" data-source="post: 2544847" data-attributes="member: 48043"><p>Carbon impingement might actually destroy accuracy in some barrels, whereas some like my 243 and 7rum shot until I could no longer get a decent measurement on the rifling origin. That tells me there was nearly zero depth to the lands and the bullets were skidding upon engraving, much as we see in cast bullet shooting when we exceed the strength of the alloy.</p><p>I suspect the carbon buildup is different depending on cleaning methods also. I gave up on taking it easy on barrels using just chems and a nylon brush when I had severe carbon buildup in a couple of overbore rifles. Now I use a fresh or nearly fresh bronze brush, hoppes, tight fitting patches, and a heck of a lot of elbo grease to "feel" the condition of the bore. I burn the copper fouling when necessary, with Barnes solvent or a couple of others I have.</p><p> I really need to get another strain gauge setup as the restrictions and origin condition should be apparent as the barrel ages. I haven't had a strain gauge since 2004.</p></blockquote><p></p>
[QUOTE="Lefty7mmstw, post: 2544847, member: 48043"] Carbon impingement might actually destroy accuracy in some barrels, whereas some like my 243 and 7rum shot until I could no longer get a decent measurement on the rifling origin. That tells me there was nearly zero depth to the lands and the bullets were skidding upon engraving, much as we see in cast bullet shooting when we exceed the strength of the alloy. I suspect the carbon buildup is different depending on cleaning methods also. I gave up on taking it easy on barrels using just chems and a nylon brush when I had severe carbon buildup in a couple of overbore rifles. Now I use a fresh or nearly fresh bronze brush, hoppes, tight fitting patches, and a heck of a lot of elbo grease to "feel" the condition of the bore. I burn the copper fouling when necessary, with Barnes solvent or a couple of others I have. I really need to get another strain gauge setup as the restrictions and origin condition should be apparent as the barrel ages. I haven't had a strain gauge since 2004. [/QUOTE]
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The Basics, Starting Out
Barrel burnout
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