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Rifles, Reloading, Optics, Equipment
Reloading
Supreme 780 accuracy
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<blockquote data-quote="Trnelson" data-source="post: 1261895" data-attributes="member: 42308"><p>I would solidly second both R-26 and IMR 7977. I would also add Norma 217. All are temperature stabile so they will be consistently linear, and predictable in performance over a wide range of temperature. You may dig W780 supreme, and it could be a useful powder, but either or both of your rigs may not, and it's not known to be temperature stabile. YMMV</p><p> I wish it worked differently, because I have an entire fireproof full of different powders. Only two of my rifles share the same powder variety. f$&@ers didn't get the memo I guess.....</p><p>Velocity alone is not a reliable indicator of a potential load. Sure, it looks nice on paper and in ballistic aps, but it is a distant third consideration behind accuracy and predictability. </p><p>For long range hunting and shooting a particular load, with the most favorable combination of accuracy, with a SD as low as possible will yield the most predictability. You are pretty well on your way if you can identify a load that prints consistently < 1-1/2" at 200 yards (~ 0.75MOA) AND has a SD of 10 fps, or LESS ideally. That will get you quite a ways out there. Just remember that velocity is fine, but accuracy is final and mass never goes away. </p><p>Have fun and be safe.</p></blockquote><p></p>
[QUOTE="Trnelson, post: 1261895, member: 42308"] I would solidly second both R-26 and IMR 7977. I would also add Norma 217. All are temperature stabile so they will be consistently linear, and predictable in performance over a wide range of temperature. You may dig W780 supreme, and it could be a useful powder, but either or both of your rigs may not, and it's not known to be temperature stabile. YMMV I wish it worked differently, because I have an entire fireproof full of different powders. Only two of my rifles share the same powder variety. f$&@ers didn't get the memo I guess..... Velocity alone is not a reliable indicator of a potential load. Sure, it looks nice on paper and in ballistic aps, but it is a distant third consideration behind accuracy and predictability. For long range hunting and shooting a particular load, with the most favorable combination of accuracy, with a SD as low as possible will yield the most predictability. You are pretty well on your way if you can identify a load that prints consistently < 1-1/2" at 200 yards (~ 0.75MOA) AND has a SD of 10 fps, or LESS ideally. That will get you quite a ways out there. Just remember that velocity is fine, but accuracy is final and mass never goes away. Have fun and be safe. [/QUOTE]
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Supreme 780 accuracy
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