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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
"Match" Chamber?
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<blockquote data-quote="Susquatch" data-source="post: 1611508" data-attributes="member: 31264"><p>I see. That makes sense to me. So we both have the same reamer then. Dunno if I'll call mine a Tac though.... LOL!</p><p></p><p>I built my deer rifle with a 9" twist for lighter 120/130 gr bullets so I can't use "tactical" 140's anyway.</p><p></p><p>Thanks for the info.</p><p></p><p>BTW, some time ago I wondered why the average 6.5 twist was so fast compared to other calibers. (picking just two examples smaller and larger, the avg 243 rifle is 10, avg 308 is 10, but the average 260 is 8). So I did some research. It turns out that the avg 6.5 bullet is quite a bit longer than other bullets for its caliber. If you make a statistical bar chart of all available bullets of all calibers by caliber you will end up with a fairly linear distribution for everything EXCEPT the 6.5/264. For some reason, they are different and have a scatter bar more like the 7mm but down two calibers - a significant "bump" or anomoly in the curve. This doesn't need to be so, but it is! I do not know for sure, but I think this is probably an artifact of the original long range intent of the 6.5s and also explains their relatively high ballistic coefficients, pencil bullets, and therefore higher twist rates. The bottom line is that the average 6.5/264 bullet is longer than other calibers for its caliber or better said, the average 6.5 bullet has a higher sectional density than the average bullet in other calibers.</p></blockquote><p></p>
[QUOTE="Susquatch, post: 1611508, member: 31264"] I see. That makes sense to me. So we both have the same reamer then. Dunno if I'll call mine a Tac though.... LOL! I built my deer rifle with a 9" twist for lighter 120/130 gr bullets so I can't use "tactical" 140's anyway. Thanks for the info. BTW, some time ago I wondered why the average 6.5 twist was so fast compared to other calibers. (picking just two examples smaller and larger, the avg 243 rifle is 10, avg 308 is 10, but the average 260 is 8). So I did some research. It turns out that the avg 6.5 bullet is quite a bit longer than other bullets for its caliber. If you make a statistical bar chart of all available bullets of all calibers by caliber you will end up with a fairly linear distribution for everything EXCEPT the 6.5/264. For some reason, they are different and have a scatter bar more like the 7mm but down two calibers - a significant "bump" or anomoly in the curve. This doesn't need to be so, but it is! I do not know for sure, but I think this is probably an artifact of the original long range intent of the 6.5s and also explains their relatively high ballistic coefficients, pencil bullets, and therefore higher twist rates. The bottom line is that the average 6.5/264 bullet is longer than other calibers for its caliber or better said, the average 6.5 bullet has a higher sectional density than the average bullet in other calibers. [/QUOTE]
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"Match" Chamber?
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