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Rifles, Reloading, Optics, Equipment
Reloading
Absolute Hammer load data
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<blockquote data-quote="mtJim" data-source="post: 2553176" data-attributes="member: 121886"><p>Finally got some shooting done with the 270 Weatherby.</p><p>24" Lilja 8 twist</p><p>139AH</p><p>Norma brass</p><p>Fed 215</p><p>67.3 gr H4350</p><p>3360 fps</p><p>never even measured oal, just seated so first "valley" is right at case mouth</p><p>1/4 turn crimp Lee factory crimp die</p><p></p><p>Started with a ladder starting at 64 grains in .5 gr increments. All initial loads were 1/8 turn crimp. Velocities from Magnetospeed.</p><p>64.0 3214</p><p>64.5 3199</p><p>65.0 3192</p><p>65.5 3233</p><p>66.0 3245</p><p>66.5 3268</p><p>67.0 3327</p><p>67.5 3342</p><p>68.0 3367 *slight ejector</p><p>68.5 3392 *slight ejector</p><p>69.0 3421 *heavy ejector, heavy bolt lift, stopped here</p><p></p><p>Loaded 3 each at 66.8, 67.0, 67.2, 67.4, 67.6. </p><p>67.2 and 67.4 were both right at 1/2" at 100 yards, so picked 67.3.</p><p>loaded 4 groups of 3 at 67.3 and varied the amount of crimp - no crimp, 1/8, 1/4, 3/8.</p><p>No crimp loads were over 1", the 1/8 crimp shrunk to 1/2", the 1/4 crimp shrunk to 3/8", and the 3/8 crimp started opening to 3/4".</p><p></p><p>5 shots on the magnetospeed yielded 3160 fps average, SD 12.</p><p></p><p>For comparison, I was shooting a 140gr Accubond with an over Nosler max charge of MagPro at 3175 fps.</p></blockquote><p></p>
[QUOTE="mtJim, post: 2553176, member: 121886"] Finally got some shooting done with the 270 Weatherby. 24" Lilja 8 twist 139AH Norma brass Fed 215 67.3 gr H4350 3360 fps never even measured oal, just seated so first "valley" is right at case mouth 1/4 turn crimp Lee factory crimp die Started with a ladder starting at 64 grains in .5 gr increments. All initial loads were 1/8 turn crimp. Velocities from Magnetospeed. 64.0 3214 64.5 3199 65.0 3192 65.5 3233 66.0 3245 66.5 3268 67.0 3327 67.5 3342 68.0 3367 *slight ejector 68.5 3392 *slight ejector 69.0 3421 *heavy ejector, heavy bolt lift, stopped here Loaded 3 each at 66.8, 67.0, 67.2, 67.4, 67.6. 67.2 and 67.4 were both right at 1/2" at 100 yards, so picked 67.3. loaded 4 groups of 3 at 67.3 and varied the amount of crimp - no crimp, 1/8, 1/4, 3/8. No crimp loads were over 1", the 1/8 crimp shrunk to 1/2", the 1/4 crimp shrunk to 3/8", and the 3/8 crimp started opening to 3/4". 5 shots on the magnetospeed yielded 3160 fps average, SD 12. For comparison, I was shooting a 140gr Accubond with an over Nosler max charge of MagPro at 3175 fps. [/QUOTE]
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