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Rifles, Reloading, Optics, Equipment
Reloading
Acceptable Powder Charge variance
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<blockquote data-quote="Pdvdh" data-source="post: 1311899" data-attributes="member: 4191"><p>I don't believe 0.02 grain powder charges are going to get my SD down to less than 10. I've already got enough expense and effort into it. I still periodically test for lower ES/SD - more for knowledge/curiosity than a necessity with this rifle. If this was my sole long range hunting rifle, I'd work harder at it. Instead this rifle is for plinking, practice, home defense, and occasionally a ground squirrel.</p><p></p><p>Again, I've never seen such large changes in MV due to small changes in powder charge weights in larger capacity cartridges/rifles, having chronographed more than 1000 (perhaps 1000s) bullet velocities over the years.</p><p></p><p>Here's the details from the Oehler 35P, Oehler 33, and PACT PC^2 chronographs.</p><p></p><p>Charge . 35P . . . 33 . . . Pact</p><p>27.0 _ _ 2814 . . 2814 . . 2812</p><p>27.0 _ _ 2883 . . 2883 . . 2881</p><p>27.0 _ _ 2850 . . 2850 . . 2849</p><p>27.0 _ _ 2796 . . 2797 . . 2796</p><p>27.0 _ _ 2831 . . 2831 . . 2829</p><p>Avg <strong>2834</strong> fps . ES 86 . SD 33</p><p></p><p></p><p>Charge . 35P . . . 33 . . . Pact</p><p>27.1 _ _ 2908 . . 2908 . . 2908</p><p>27.1 _ _ 2884 . . 2884 . . 2883</p><p>27.1 _ _ 2862 . . 2862 . . 2860</p><p>27.1 _ _ 2862 . . 2862 . . 2860</p><p>27.1 _ _ 2886 . . 2888 . . 2886</p><p>Avg <strong>2880</strong> fps . ES 47 . SD 20</p></blockquote><p></p>
[QUOTE="Pdvdh, post: 1311899, member: 4191"] I don't believe 0.02 grain powder charges are going to get my SD down to less than 10. I've already got enough expense and effort into it. I still periodically test for lower ES/SD - more for knowledge/curiosity than a necessity with this rifle. If this was my sole long range hunting rifle, I'd work harder at it. Instead this rifle is for plinking, practice, home defense, and occasionally a ground squirrel. Again, I've never seen such large changes in MV due to small changes in powder charge weights in larger capacity cartridges/rifles, having chronographed more than 1000 (perhaps 1000s) bullet velocities over the years. Here's the details from the Oehler 35P, Oehler 33, and PACT PC^2 chronographs. Charge . 35P . . . 33 . . . Pact 27.0 _ _ 2814 . . 2814 . . 2812 27.0 _ _ 2883 . . 2883 . . 2881 27.0 _ _ 2850 . . 2850 . . 2849 27.0 _ _ 2796 . . 2797 . . 2796 27.0 _ _ 2831 . . 2831 . . 2829 Avg [B]2834[/B] fps . ES 86 . SD 33 Charge . 35P . . . 33 . . . Pact 27.1 _ _ 2908 . . 2908 . . 2908 27.1 _ _ 2884 . . 2884 . . 2883 27.1 _ _ 2862 . . 2862 . . 2860 27.1 _ _ 2862 . . 2862 . . 2860 27.1 _ _ 2886 . . 2888 . . 2886 Avg [B]2880[/B] fps . ES 47 . SD 20 [/QUOTE]
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Acceptable Powder Charge variance
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