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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Introducing the Absolute Hammer
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<blockquote data-quote="parshal" data-source="post: 1992705" data-attributes="member: 605"><p>Above is my velocity testing in the yard with R23 in a 6.5 Sherman Short. Above was 74-80 degrees. I took a few loads to the range today to check accuracy. Today was 60. I started with a clean barrel and shot the following at 100 yards in this order.</p><p></p><p>58.8, 5 shots, 3332 FPS, .511", SD 8.6, ES 19</p><p>59, 3 shots, 3358 FPS, .320, SD 4.5, ES 9</p><p>59.2, 3 shots, 3352, .248", SD 13.8, ES 28, slight ejector</p><p>59.4, 3 shots, 3359, SD 3.3, ES 6, ejector</p><p></p><p>I'd say the velocity 'node' from single shots fired the other day is quite obviously there. I did see pressure at 59.4 that I did not see the other day.</p><p></p><p>I'm going to load up a bunch at 59 grains for the SD and lower pressure, verify zero and drop at 600 and go hunting!</p><p></p><p>All loads R23.</p><p>.050" off the lands</p><p>26" proof carbon 1:8 with suppressor</p><p>6.5 SS</p><p>6.5 SS ADG headstamped. Fired once to fireform. Brass still not fully formed.</p><p>Fed 210</p></blockquote><p></p>
[QUOTE="parshal, post: 1992705, member: 605"] Above is my velocity testing in the yard with R23 in a 6.5 Sherman Short. Above was 74-80 degrees. I took a few loads to the range today to check accuracy. Today was 60. I started with a clean barrel and shot the following at 100 yards in this order. 58.8, 5 shots, 3332 FPS, .511", SD 8.6, ES 19 59, 3 shots, 3358 FPS, .320, SD 4.5, ES 9 59.2, 3 shots, 3352, .248", SD 13.8, ES 28, slight ejector 59.4, 3 shots, 3359, SD 3.3, ES 6, ejector I'd say the velocity 'node' from single shots fired the other day is quite obviously there. I did see pressure at 59.4 that I did not see the other day. I'm going to load up a bunch at 59 grains for the SD and lower pressure, verify zero and drop at 600 and go hunting! All loads R23. .050" off the lands 26" proof carbon 1:8 with suppressor 6.5 SS 6.5 SS ADG headstamped. Fired once to fireform. Brass still not fully formed. Fed 210 [/QUOTE]
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Introducing the Absolute Hammer
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