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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Short necks=short throat life??
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<blockquote data-quote="Waltech Jim" data-source="post: 58007" data-attributes="member: 3214"><p>Goodgrouper,</p><p></p><p>Myself along with several buddies (and a Brother I usually don't recognize) have been shooting, and shooting out, 22-250 barrels for years at prairie dogs. They say an expert is someone who has made all the mistakes one can make in a very narrow field.... I can't say we are experts but I know we have made all kinds of mistakes. </p><p></p><p>One of the things we observed early on is that barrel life (22-250) was a function of how hot your loads were and how quickly you shot (how hot you got the barrel). If a person shoots slowly this variable (excessive barrel heat) is eliminated and then the most important factor in barrel life becomes the load you are shooting. I recall your post on twist rate (12/19) where you state your loads were slightly loosening the primer pockets. With all due respect, I would have to seriously question this as a possible reason for the lack of barrel life. A load that loosens primer pockets is producing a plasma that will have no problems vaporizing barrel metal. </p><p></p><p>Other things we have found through years of testing (making mistakes) is moly helps lengthen the number of rounds you can shoot before you have to clean. We have not found it to have a positive effect on barrel life, and it can be argued that it has a negative effect as some guys add more powder to make up for the loss in velocity that might happen when going to moly vs non-moly bullets. None of us are using double-based powders anymore. (observation)</p><p></p><p>As for the length of case neck having to do with barrel life, the first thing that came to mind was the 300 WM. The short for caliber case neck is often mentioned, but I have never heard of the complaint it is a barrel burner. (I use a 300 WM on prairie dogs and it has throated approximately .005 in 2000 rounds. Not excessive in this hobby). JMO</p><p></p><p>Merry Christmas and Happy New Year</p><p></p><p>Jim</p></blockquote><p></p>
[QUOTE="Waltech Jim, post: 58007, member: 3214"] Goodgrouper, Myself along with several buddies (and a Brother I usually don’t recognize) have been shooting, and shooting out, 22-250 barrels for years at prairie dogs. They say an expert is someone who has made all the mistakes one can make in a very narrow field.... I can’t say we are experts but I know we have made all kinds of mistakes. One of the things we observed early on is that barrel life (22-250) was a function of how hot your loads were and how quickly you shot (how hot you got the barrel). If a person shoots slowly this variable (excessive barrel heat) is eliminated and then the most important factor in barrel life becomes the load you are shooting. I recall your post on twist rate (12/19) where you state your loads were slightly loosening the primer pockets. With all due respect, I would have to seriously question this as a possible reason for the lack of barrel life. A load that loosens primer pockets is producing a plasma that will have no problems vaporizing barrel metal. Other things we have found through years of testing (making mistakes) is moly helps lengthen the number of rounds you can shoot before you have to clean. We have not found it to have a positive effect on barrel life, and it can be argued that it has a negative effect as some guys add more powder to make up for the loss in velocity that might happen when going to moly vs non-moly bullets. None of us are using double-based powders anymore. (observation) As for the length of case neck having to do with barrel life, the first thing that came to mind was the 300 WM. The short for caliber case neck is often mentioned, but I have never heard of the complaint it is a barrel burner. (I use a 300 WM on prairie dogs and it has throated approximately .005 in 2000 rounds. Not excessive in this hobby). JMO Merry Christmas and Happy New Year Jim [/QUOTE]
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Short necks=short throat life??
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