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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
160gr Matrix
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<blockquote data-quote="rooster721" data-source="post: 798656" data-attributes="member: 40654"><p>Yah, lol.. I used that same calculator while waiting for my 160's to come in the mail. My numbers are 1975 elevation, and actually shoot the 140 Hunting vld's. Using those numbers and a 9 twist (@ 3135/140vld) I was getting 1.3-ish stability. With the 140's. If I recall off the top of my head, about 1.16 or 1.2-ish for the 160's.. crossed my fingers hoping that's be close enuf, but no sir... I also plugged in a bunch of numbers out of some bench-rest articles using velocities, twists & bullets they were shooting thru 6.5x284's and noted that the 8.5 twists (and their load info) was giving stability numbers on that calculator also in the 1.3 range* ..would think those boys would have good reason using 8.5 and 1.3 stability numbers to shoot 1000y matches. Compares nicely to my 140 numbers thru my 1:9.. obviously tho, not so nicely with the 160's. And my targets prove the fact*</p><p></p><p>Interesting either way* Definitely need more than 1:9 in this case for the 160's.. that info should help "some guys" anyway!</p></blockquote><p></p>
[QUOTE="rooster721, post: 798656, member: 40654"] Yah, lol.. I used that same calculator while waiting for my 160's to come in the mail. My numbers are 1975 elevation, and actually shoot the 140 Hunting vld's. Using those numbers and a 9 twist (@ 3135/140vld) I was getting 1.3-ish stability. With the 140's. If I recall off the top of my head, about 1.16 or 1.2-ish for the 160's.. crossed my fingers hoping that's be close enuf, but no sir... I also plugged in a bunch of numbers out of some bench-rest articles using velocities, twists & bullets they were shooting thru 6.5x284's and noted that the 8.5 twists (and their load info) was giving stability numbers on that calculator also in the 1.3 range* ..would think those boys would have good reason using 8.5 and 1.3 stability numbers to shoot 1000y matches. Compares nicely to my 140 numbers thru my 1:9.. obviously tho, not so nicely with the 160's. And my targets prove the fact* Interesting either way* Definitely need more than 1:9 in this case for the 160's.. that info should help "some guys" anyway! [/QUOTE]
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