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Rifles, Reloading, Optics, Equipment
Reloading
Absolute Hammer load data
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<blockquote data-quote="Grifm" data-source="post: 2085547" data-attributes="member: 116508"><p>Made it back to the range today to continue testing with my 308 and the 151 AHs. Today I tested Alliant Power Pro Varmint. Loaded up 1 round each in 0.5 gr steps from 45-52.5 gr. Brass was sized with Redding dies with expander removed. Measured 0.006 neck tension. Temperature was 54 deg. Velocity recorded on CD ProCronoDLX.</p><p></p><p>Start Low and work up on charge weight!</p><p></p><p>Winchester M70 FTW SS - 308Win</p><p>22in Factory 1in12 twist</p><p>Lapua Brass - Trimmed 2.006</p><p>Fed 215</p><p>COAL - 2.863</p><p></p><p> 1) 45.0 - 2724</p><p> 2) 45.5 - 2716</p><p> 3) 46.0 - 2778</p><p> 4) 46.5 - 2830</p><p> 5) 47.0 - 2838</p><p> 6) 47.5 - 2852</p><p> 7) 48.0 - 2912</p><p> 8) 48.5 - 2929</p><p> 9) 49.0 - 2959</p><p>10) 49.5 - 2773</p><p>11) 50.0 - 2997</p><p>12) 50.5 - 3016</p><p>13) 51.0 - 3045</p><p>14) 51.5 - 3099</p><p>15) 52.0 - 3096 easy bolt lift, slight ejector mark</p><p>16) 52.5 - 3135 stiff bolt lift, clear ejector mark - STOP.</p><p></p><p>Given where I found pressure I'd probably drop down around 51.5 or just a little lower. My previous test with benchmark topped out right at 100fps slower. I'll probably stick with the benchmark load just because it is a Hodgdon "Extreme" powder and be more temperature stable than the Power Pro Varmint which is a ball powder.</p></blockquote><p></p>
[QUOTE="Grifm, post: 2085547, member: 116508"] Made it back to the range today to continue testing with my 308 and the 151 AHs. Today I tested Alliant Power Pro Varmint. Loaded up 1 round each in 0.5 gr steps from 45-52.5 gr. Brass was sized with Redding dies with expander removed. Measured 0.006 neck tension. Temperature was 54 deg. Velocity recorded on CD ProCronoDLX. Start Low and work up on charge weight! Winchester M70 FTW SS - 308Win 22in Factory 1in12 twist Lapua Brass - Trimmed 2.006 Fed 215 COAL - 2.863 1) 45.0 - 2724 2) 45.5 - 2716 3) 46.0 - 2778 4) 46.5 - 2830 5) 47.0 - 2838 6) 47.5 - 2852 7) 48.0 - 2912 8) 48.5 - 2929 9) 49.0 - 2959 10) 49.5 - 2773 11) 50.0 - 2997 12) 50.5 - 3016 13) 51.0 - 3045 14) 51.5 - 3099 15) 52.0 - 3096 easy bolt lift, slight ejector mark 16) 52.5 - 3135 stiff bolt lift, clear ejector mark - STOP. Given where I found pressure I'd probably drop down around 51.5 or just a little lower. My previous test with benchmark topped out right at 100fps slower. I'll probably stick with the benchmark load just because it is a Hodgdon "Extreme" powder and be more temperature stable than the Power Pro Varmint which is a ball powder. [/QUOTE]
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