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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
7 stw vs 7 ultra mag
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<blockquote data-quote="Trickymissfit" data-source="post: 708642" data-attributes="member: 25383"><p>I just have a vivid memory of all the barrels that Tony and the other guys went thru. Tony pretty much did his own chambers with his own custom ground reamer. The other guys bought one off a grinder out of Michigan and used it to chamber the other rifles. I was greatly impressed with the extreme long range accuracey that Tony saw which kinda violates the overbore concept, but also know that Tony is a very dedicated reloader. I saw similar results with several gys that did the 6/284 round, and kinda sat back and watch their chambers and throats evolve into a round that worked well. Both got better by pushing the shoulders back a little bit while not loosing much in velocity and gaining a much longer barrel life.</p><p> </p><p>The gist of my post is that you can only burn so much powder in a 26" or 28" barrel, and apparently Mr. Mashburn was way out in front of the rest of us newbies. You start out with something like the 7-08 (very efficient and pretty good accuracey) and start gettting bigger and bigger in capacity with deminishing returns. This tells me we are simply blowing a lot of unburnt powder out the end of the barrel (hard on the barrel as well). This is why I said the 7mm WBY was about it for powder burn in a 26" or even a 28" barrel.</p><p>I do think that by simply pushing the shoulder back .100" and leaving the case alone you will see a much greater barrel life with similar velocities. Plus it will help guide those 160 thru 180 grainbullets a little better into the throat. Perhaps I'm wrong, but it sure looks good to me. </p><p>gary</p></blockquote><p></p>
[QUOTE="Trickymissfit, post: 708642, member: 25383"] I just have a vivid memory of all the barrels that Tony and the other guys went thru. Tony pretty much did his own chambers with his own custom ground reamer. The other guys bought one off a grinder out of Michigan and used it to chamber the other rifles. I was greatly impressed with the extreme long range accuracey that Tony saw which kinda violates the overbore concept, but also know that Tony is a very dedicated reloader. I saw similar results with several gys that did the 6/284 round, and kinda sat back and watch their chambers and throats evolve into a round that worked well. Both got better by pushing the shoulders back a little bit while not loosing much in velocity and gaining a much longer barrel life. The gist of my post is that you can only burn so much powder in a 26" or 28" barrel, and apparently Mr. Mashburn was way out in front of the rest of us newbies. You start out with something like the 7-08 (very efficient and pretty good accuracey) and start gettting bigger and bigger in capacity with deminishing returns. This tells me we are simply blowing a lot of unburnt powder out the end of the barrel (hard on the barrel as well). This is why I said the 7mm WBY was about it for powder burn in a 26" or even a 28" barrel. I do think that by simply pushing the shoulder back .100" and leaving the case alone you will see a much greater barrel life with similar velocities. Plus it will help guide those 160 thru 180 grainbullets a little better into the throat. Perhaps I'm wrong, but it sure looks good to me. gary [/QUOTE]
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7 stw vs 7 ultra mag
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