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Long Range Hunting & Shooting
How much throat erosion is “normal”
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<blockquote data-quote="Hugnot" data-source="post: 2790963" data-attributes="member: 115658"><p>Much good info in all pages.</p><p></p><p>The .243 W is very popular for any number of reasons, including competitive use but eats up barrels fast. This is to be expected.</p><p></p><p>I have had a variety of .243's for many years and think that .243 barrels are sort of like tires in that they can be expected to wear out at an accelerated but predictable rate depending on conditions.</p><p></p><p>I shoot 87 VMax,105 Hornady HPBT, & 105 Barnes Match Burners. Longest barrel life has been with 105's loaded with single base slow burning powders like H4831 or VN165. I seat bullets further out with wear/use and crimp bullets. I check seating depth with each 50-100 round lot to be loaded. Powder burn rates may vary from lot to lot over time, so I evaluate powder charges with each lot.</p><p></p><p>My thinking is the gradual sloping .243 Win shoulder contributes to rapid throat erosion vs. the more abrupt shoulder of the .243 AI.</p><p></p><p>I like to have a barrel-stock gap wide enough for a double thickness of paper towel to easily pass. When the barrel gets hot, I pass a double thickness of wet paper towel thru gap. Evaporation happening in dry conditions, like when shooting rodents, cools the barrel. When thru shooting, I spray Hornady One Shot on a paper towel to clean up and coat barrel in stock.</p><p></p><p>After 1000 or less rounds, many of my .243W barrels have been replaced with .22-.250 barrels. I have no plans to shoot a bucket full of .243W at rodents on a hot day - I use a .20P for that.</p></blockquote><p></p>
[QUOTE="Hugnot, post: 2790963, member: 115658"] Much good info in all pages. The .243 W is very popular for any number of reasons, including competitive use but eats up barrels fast. This is to be expected. I have had a variety of .243's for many years and think that .243 barrels are sort of like tires in that they can be expected to wear out at an accelerated but predictable rate depending on conditions. I shoot 87 VMax,105 Hornady HPBT, & 105 Barnes Match Burners. Longest barrel life has been with 105's loaded with single base slow burning powders like H4831 or VN165. I seat bullets further out with wear/use and crimp bullets. I check seating depth with each 50-100 round lot to be loaded. Powder burn rates may vary from lot to lot over time, so I evaluate powder charges with each lot. My thinking is the gradual sloping .243 Win shoulder contributes to rapid throat erosion vs. the more abrupt shoulder of the .243 AI. I like to have a barrel-stock gap wide enough for a double thickness of paper towel to easily pass. When the barrel gets hot, I pass a double thickness of wet paper towel thru gap. Evaporation happening in dry conditions, like when shooting rodents, cools the barrel. When thru shooting, I spray Hornady One Shot on a paper towel to clean up and coat barrel in stock. After 1000 or less rounds, many of my .243W barrels have been replaced with .22-.250 barrels. I have no plans to shoot a bucket full of .243W at rodents on a hot day - I use a .20P for that. [/QUOTE]
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How much throat erosion is “normal”
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