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The Over-Rated Crown
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<blockquote data-quote="westcliffe01" data-source="post: 831772" data-attributes="member: 35183"><p>Perhaps I missed it somewhere, but If I got the jist of it, this was a 308 shooting Federal .308 Gold Medal Match 175 grain Sierra Matchking out of a 24" barrel.</p><p></p><p>I wonder what the residual pressure is from that ammo when the base of the bullet reaches the muzzle ? It is possible that a cartridge like a 300WM which contains more powder and operates at higher pressure might not have shown the same result.</p><p></p><p>In addition, all the testing was done with a boat tail bullet. Is it not possible that any form of flat base bullet might have reacted more adversely to this treatment, since the base of the bullet leaving the bore opens up the gas passage in a far more abrupt manner than the tapered end of a boat tail bullet which opens it more gradually ?</p><p></p><p>If the author had cut the barrel down to shorter lengths, recrowned it and then damaged that crown (and used different style of bullets) one would have obtained a more multi dimensional set of data compared to this single variable style test.</p></blockquote><p></p>
[QUOTE="westcliffe01, post: 831772, member: 35183"] Perhaps I missed it somewhere, but If I got the jist of it, this was a 308 shooting Federal .308 Gold Medal Match 175 grain Sierra Matchking out of a 24" barrel. I wonder what the residual pressure is from that ammo when the base of the bullet reaches the muzzle ? It is possible that a cartridge like a 300WM which contains more powder and operates at higher pressure might not have shown the same result. In addition, all the testing was done with a boat tail bullet. Is it not possible that any form of flat base bullet might have reacted more adversely to this treatment, since the base of the bullet leaving the bore opens up the gas passage in a far more abrupt manner than the tapered end of a boat tail bullet which opens it more gradually ? If the author had cut the barrel down to shorter lengths, recrowned it and then damaged that crown (and used different style of bullets) one would have obtained a more multi dimensional set of data compared to this single variable style test. [/QUOTE]
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