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Hunting
The Basics, Starting Out
Barrel burnout
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<blockquote data-quote="Greyfox" data-source="post: 2545041" data-attributes="member: 10291"><p>I have followed the same practice as MikeCR when cleaning rifles. After cleaning, I will apply a light coat of oil, preferring Montana Bore Conditioner. From a clean barrel it can take 3-5 shots to stabilize velocity and my original zero. Un-checked, over time and shot count volume, carbon will build-up will develop in two areas…..A carbon ring in the throat, and, as a carbon slick running one half to two thirds down the length of the barrel. The carbon ring in the throat tends to be more problematic. This will be hard carbon, will not show up on your Lilly white cleaning patches, and is hard to see without the use of a good bore-scope. The effect on shooting can be a gradual increase in velocity(pressure), and/or accuracy loss. To keep this hard carbon build up in check, I will ALWAYS clean with a quality bronze bore brush(Dewey) and carbon solvent like BoreTech Carbon solvent. Avoiding the build-up from the beginning is the best way to keep the carbon build-up in check. If carbon build-up is evidenced, a thorough scrubbing with a bronze brush(with BoreTechCR) along with some JB Bore Paste on a tight patch will get rid of the carbon. With my high precision LR hunting rifles, after barrel break-in, I will take an initial accurate measurement of my throat(BTO). I will take this measurement, check for any fire-cracking into the lands, and test accuracy every 300 rounds or so, keeping accurate count of the number of shots down the barrel. When shooting, I will never let my barrel get beyond slightly warm to the touch(this is a very different approach compared to my competition rifles). Shooting HOT can reduce barrel life by as much as 50%! While I replace barrels on my competition rifles quite frequently, I am loathe to do this on my go-to, finely tuned and well understood +1000 yard hunters. This approach does work for me. Shooting 6.5x284's almost exclusively for LR hunting for quite some time, I have rifles with over 1000 rounds down the tube with no material increase in throat erosion(BTO) or loss of shooting performance. </p><p>Example; 2022vs2011, 200 yard accuracy of my 11 year old Cooper 6.5x284 with 1017 rounds. No change in MV or accuracy. </p><p>[ATTACH]369941[/ATTACH][ATTACH]369942[/ATTACH]</p></blockquote><p></p>
[QUOTE="Greyfox, post: 2545041, member: 10291"] I have followed the same practice as MikeCR when cleaning rifles. After cleaning, I will apply a light coat of oil, preferring Montana Bore Conditioner. From a clean barrel it can take 3-5 shots to stabilize velocity and my original zero. Un-checked, over time and shot count volume, carbon will build-up will develop in two areas…..A carbon ring in the throat, and, as a carbon slick running one half to two thirds down the length of the barrel. The carbon ring in the throat tends to be more problematic. This will be hard carbon, will not show up on your Lilly white cleaning patches, and is hard to see without the use of a good bore-scope. The effect on shooting can be a gradual increase in velocity(pressure), and/or accuracy loss. To keep this hard carbon build up in check, I will ALWAYS clean with a quality bronze bore brush(Dewey) and carbon solvent like BoreTech Carbon solvent. Avoiding the build-up from the beginning is the best way to keep the carbon build-up in check. If carbon build-up is evidenced, a thorough scrubbing with a bronze brush(with BoreTechCR) along with some JB Bore Paste on a tight patch will get rid of the carbon. With my high precision LR hunting rifles, after barrel break-in, I will take an initial accurate measurement of my throat(BTO). I will take this measurement, check for any fire-cracking into the lands, and test accuracy every 300 rounds or so, keeping accurate count of the number of shots down the barrel. When shooting, I will never let my barrel get beyond slightly warm to the touch(this is a very different approach compared to my competition rifles). Shooting HOT can reduce barrel life by as much as 50%! While I replace barrels on my competition rifles quite frequently, I am loathe to do this on my go-to, finely tuned and well understood +1000 yard hunters. This approach does work for me. Shooting 6.5x284’s almost exclusively for LR hunting for quite some time, I have rifles with over 1000 rounds down the tube with no material increase in throat erosion(BTO) or loss of shooting performance. Example; 2022vs2011, 200 yard accuracy of my 11 year old Cooper 6.5x284 with 1017 rounds. No change in MV or accuracy. [ATTACH]369941[/ATTACH][ATTACH]369942[/ATTACH] [/QUOTE]
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