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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Gel Test Data part 2
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<blockquote data-quote="RockyMtnMT" data-source="post: 2673080" data-attributes="member: 7999"><p>The goal with the reduced velocity was to have stability above 1.5 sg on the Miller formula. The 9" twist did this at 1.63sg with the muzzle velocity at 2157 fps. This is calculated at sea level without adding in the 3000' elevation at the shooting position. So, well above full stability. You are correct that the rpm's are lower than the full tilt load in the 8" twist. In all honesty, I did not consider rpm's for the test. I was focused on making sure both bullets were fully stable. Both bullets dealt with the same 9" twist for the 300y shot. The Hammer was lower in stability due to the lighter weight and longer oal.</p></blockquote><p></p>
[QUOTE="RockyMtnMT, post: 2673080, member: 7999"] The goal with the reduced velocity was to have stability above 1.5 sg on the Miller formula. The 9" twist did this at 1.63sg with the muzzle velocity at 2157 fps. This is calculated at sea level without adding in the 3000' elevation at the shooting position. So, well above full stability. You are correct that the rpm's are lower than the full tilt load in the 8" twist. In all honesty, I did not consider rpm's for the test. I was focused on making sure both bullets were fully stable. Both bullets dealt with the same 9" twist for the 300y shot. The Hammer was lower in stability due to the lighter weight and longer oal. [/QUOTE]
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Gel Test Data part 2
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