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Rifles, Reloading, Optics, Equipment
Reloading
Help with velocity variance
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<blockquote data-quote="SBruce" data-source="post: 453991" data-attributes="member: 21068"><p>33 fps is pretty good for most normal cartridges. I've always had good luck with Winchester Brass. </p><p> </p><p>For a large case, 5 grains is not alot, but I try to sort to within +/- 1 to 1.5 grain on smaller cases........or about 1 percent. I only do this after the cases are uniformed in length and size, and after primer pockets have been cut to uniform depths and flash holes have been de-burred.</p><p> </p><p>The new brass may help alot, just be sure to get it all as consistent and uniform as possible before loading it. If you're still have issues with new brass, try a different primer. </p><p> </p><p><strong>I don't know how accurate your chronograph is, but even 99.5% accurate means possibly 15 fps variance on a round that shoots the velocity you mentioned.</strong></p><p> </p><p><strong>One other thing, try to get your chronograph about 12-15' from the muzzle. If your chrono is moving as the bullet passes through it............ it's probably gonna give some errors.</strong></p><p> </p><p>Best o Luck.</p></blockquote><p></p>
[QUOTE="SBruce, post: 453991, member: 21068"] 33 fps is pretty good for most normal cartridges. I've always had good luck with Winchester Brass. For a large case, 5 grains is not alot, but I try to sort to within +/- 1 to 1.5 grain on smaller cases........or about 1 percent. I only do this after the cases are uniformed in length and size, and after primer pockets have been cut to uniform depths and flash holes have been de-burred. The new brass may help alot, just be sure to get it all as consistent and uniform as possible before loading it. If you're still have issues with new brass, try a different primer. [B]I don't know how accurate your chronograph is, but even 99.5% accurate means possibly 15 fps variance on a round that shoots the velocity you mentioned.[/B] [B]One other thing, try to get your chronograph about 12-15' from the muzzle. If your chrono is moving as the bullet passes through it............ it's probably gonna give some errors.[/B] Best o Luck. [/QUOTE]
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Help with velocity variance
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