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Rifles, Reloading, Optics, Equipment
Reloading
6.5 PRC velocity loss.
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<blockquote data-quote="MagnumManiac" data-source="post: 2295783" data-attributes="member: 10755"><p>Normally, when going to once fired brass from new brass, the same charge weight INCREASES the velocity.</p><p>An increase in velocity can change POI, even though you zeroed at whatever distance, that change can be in ANY direction.</p><p>As rfurnan24 indicates, you need to verify drops and not just go off of chrono readings.</p><p>A slight angle on an optical chrono can change the reading by a few hundred fps.</p><p>I run 2, they never match each other perfectly, the difference when set up right is about 25fps, if it's more than this, I know that it's not set up level to the bullet path.</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 2295783, member: 10755"] Normally, when going to once fired brass from new brass, the same charge weight INCREASES the velocity. An increase in velocity can change POI, even though you zeroed at whatever distance, that change can be in ANY direction. As rfurnan24 indicates, you need to verify drops and not just go off of chrono readings. A slight angle on an optical chrono can change the reading by a few hundred fps. I run 2, they never match each other perfectly, the difference when set up right is about 25fps, if it’s more than this, I know that it’s not set up level to the bullet path. Cheers. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
6.5 PRC velocity loss.
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