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Rifles, Reloading, Optics, Equipment
Reloading
6.5 Sherman LA loading
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<blockquote data-quote="dok7mm" data-source="post: 1479075" data-attributes="member: 90080"><p>Update: I managed to locate 7- 1# bottles of N-570, cheap because the guy just didn't like the big grains. Lucky me.</p><p></p><p>Anyway, I loaded up some 150 Matrix for pressure tests @ .030" off, with the N-570, with .5 gr. intervals. Coolest day in months, @ 75*, heavy cloud cover and rain.</p><p>62.0 - 3025 fps</p><p>62.5 - 3040</p><p>63.0 - 3064</p><p>63.5 - 3102</p><p>64.0 - 3138</p><p>64.5 - 3145</p><p>65.0 - 3165</p><p></p><p>I kept expecting pressure every shot, but it never came. There was the faintest smear on 65.0, no bolt lift signs. 26" Bart 5R 8 twist, 648 rds. I was surprised the velocity matched my 140/Retumbo load. Velocities (LabRadar) are the average of 2 targets, one @ 100 and another at 200, same charges. The longer range was closed because of rain.</p><p>ADD. 7th firing on 280 Norma brass.</p><p>[ATTACH=full]105068[/ATTACH]</p></blockquote><p></p>
[QUOTE="dok7mm, post: 1479075, member: 90080"] Update: I managed to locate 7- 1# bottles of N-570, cheap because the guy just didn't like the big grains. Lucky me. Anyway, I loaded up some 150 Matrix for pressure tests @ .030" off, with the N-570, with .5 gr. intervals. Coolest day in months, @ 75*, heavy cloud cover and rain. 62.0 - 3025 fps 62.5 - 3040 63.0 - 3064 63.5 - 3102 64.0 - 3138 64.5 - 3145 65.0 - 3165 I kept expecting pressure every shot, but it never came. There was the faintest smear on 65.0, no bolt lift signs. 26" Bart 5R 8 twist, 648 rds. I was surprised the velocity matched my 140/Retumbo load. Velocities (LabRadar) are the average of 2 targets, one @ 100 and another at 200, same charges. The longer range was closed because of rain. ADD. 7th firing on 280 Norma brass. [ATTACH=full]105068[/ATTACH] [/QUOTE]
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Reloading
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