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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Barrel life consideration
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<blockquote data-quote="Trickymissfit" data-source="post: 937418" data-attributes="member: 25383"><p>not arguing with anybody here, but I do have a comment of the 22-250 and barrel life. I own three of them, and each one likes the same identical load and bullet! Is that not rare? The first rifle I discovered this load is long gone, or otherwise there would have been four rifles. The load is 35.5 grains of IMR 3031 with a Sierra 55 grain bullet seated within .003" of the lands. Shot a few sub .20" five shot groups with it. In rifle #2, I started to see the groups opening up after about 1400 shots. The groups were still quite acceptable and were sub 3/8th". Pulled the barrel and gave it a major cleaning, thinking that was all it needed. Still shot about the same. So I pulled the barrel again, and soaked it over night and then cleaned it. But before reinstalling it, I went over to a buddies place and we looked at with his Hawk Eye. The throat was starting to erode. Not real bad, but you could easily see it. Did a 3/8th" barrel set back, and rechambered it. Went right back to shooting those common quarter inch groups again. Now I honestly think that rifle #2 would have gone a rock solid 2000 rounds, but also think the groups would have been north of a half inch. Thinking about this a little bit, I think some of this issue was the preference for IMR 3031 (known to be a little harder on barrels). Now I can expect the samething out of the other two as well. On the opposite side of the scale, I used to shoot a couple of 6mm Remington's with some seriously hot loads.</p><p>The cases used were from a very old lot of Winchester .257 Roberts brass that held about a grain and a half more powder. On one of them I did a scope check with about 1800 rounds down the tube. The throat looked like it might have had 500 rounds of .243 thru it (we actually compared two .243 barrels to it for giggles). Plus it was a C/M barrel to boot. Without a doubt that barrel would have gone to 3000 shots. I think case design here was the plus factor. </p><p> </p><p>In a typical hunting rifle being shot well under 500 yards; the above is over the top. But after taking two or three Coyotes in the 650 yard area it became important. Add to this the fact that the average hunting rifle rarely sees 1200 shots anyway. Anyway I put a lot of credence of case design verses barrel life when it's all said and done.</p><p>gary</p></blockquote><p></p>
[QUOTE="Trickymissfit, post: 937418, member: 25383"] not arguing with anybody here, but I do have a comment of the 22-250 and barrel life. I own three of them, and each one likes the same identical load and bullet! Is that not rare? The first rifle I discovered this load is long gone, or otherwise there would have been four rifles. The load is 35.5 grains of IMR 3031 with a Sierra 55 grain bullet seated within .003" of the lands. Shot a few sub .20" five shot groups with it. In rifle #2, I started to see the groups opening up after about 1400 shots. The groups were still quite acceptable and were sub 3/8th". Pulled the barrel and gave it a major cleaning, thinking that was all it needed. Still shot about the same. So I pulled the barrel again, and soaked it over night and then cleaned it. But before reinstalling it, I went over to a buddies place and we looked at with his Hawk Eye. The throat was starting to erode. Not real bad, but you could easily see it. Did a 3/8th" barrel set back, and rechambered it. Went right back to shooting those common quarter inch groups again. Now I honestly think that rifle #2 would have gone a rock solid 2000 rounds, but also think the groups would have been north of a half inch. Thinking about this a little bit, I think some of this issue was the preference for IMR 3031 (known to be a little harder on barrels). Now I can expect the samething out of the other two as well. On the opposite side of the scale, I used to shoot a couple of 6mm Remington's with some seriously hot loads. The cases used were from a very old lot of Winchester .257 Roberts brass that held about a grain and a half more powder. On one of them I did a scope check with about 1800 rounds down the tube. The throat looked like it might have had 500 rounds of .243 thru it (we actually compared two .243 barrels to it for giggles). Plus it was a C/M barrel to boot. Without a doubt that barrel would have gone to 3000 shots. I think case design here was the plus factor. In a typical hunting rifle being shot well under 500 yards; the above is over the top. But after taking two or three Coyotes in the 650 yard area it became important. Add to this the fact that the average hunting rifle rarely sees 1200 shots anyway. Anyway I put a lot of credence of case design verses barrel life when it's all said and done. gary [/QUOTE]
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