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Rifles, Reloading, Optics, Equipment
Reloading
Acceptable Powder Charge variance
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<blockquote data-quote="Pdvdh" data-source="post: 1311859" data-attributes="member: 4191"><p>I considered that prior to posting. The ES/SDs were not great. But I still felt it was tough to dismiss the fact that there was a large difference in MV.</p><p></p><p>5 velocities @ 27.0gr Hodgdon CFE223: ES 86 . . . SD 33</p><p></p><p>5 velocities @ 27.1gr Hodgdon CFE223: ES 47 . . . SD 20</p><p></p><p>I've spent a lot of time loading and shooting a variety of 60gr Vmax's over my chronographs, with 5 different powders, in the effort to obtain lowered ES/SD. I've been forced to the conclusion that the gas activated actions on the AR-15s cause larger ES/SD compared to fixed/bolt action rifles. It makes some sense to me. The bolt and bolt carrier in the AR-15 action are in motion while the bullet is still in the barrel, which creates another variable affecting the MV. At least that's what I've concluded.</p><p></p><p>Just so you don't think I'm completely full of <em>****</em>, I started a Thread that evolved into that very topic. My posts in that Thread document a small portion of my efforts searching reduced ES/SD. </p><p><a href="http://www.longrangehunting.com/forums/f111/hodgdon-varget-223-temperature-sensitive-161154/" target="_blank">http://www.longrangehunting.com/forums/f111/hodgdon-varget-223-temperature-sensitive-161154/</a></p></blockquote><p></p>
[QUOTE="Pdvdh, post: 1311859, member: 4191"] I considered that prior to posting. The ES/SDs were not great. But I still felt it was tough to dismiss the fact that there was a large difference in MV. 5 velocities @ 27.0gr Hodgdon CFE223: ES 86 . . . SD 33 5 velocities @ 27.1gr Hodgdon CFE223: ES 47 . . . SD 20 I've spent a lot of time loading and shooting a variety of 60gr Vmax's over my chronographs, with 5 different powders, in the effort to obtain lowered ES/SD. I've been forced to the conclusion that the gas activated actions on the AR-15s cause larger ES/SD compared to fixed/bolt action rifles. It makes some sense to me. The bolt and bolt carrier in the AR-15 action are in motion while the bullet is still in the barrel, which creates another variable affecting the MV. At least that's what I've concluded. Just so you don't think I'm completely full of [I]****[/I], I started a Thread that evolved into that very topic. My posts in that Thread document a small portion of my efforts searching reduced ES/SD. [url]http://www.longrangehunting.com/forums/f111/hodgdon-varget-223-temperature-sensitive-161154/[/url] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Acceptable Powder Charge variance
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