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Rifles, Reloading, Optics, Equipment
Reloading
Questions about chronograph speeds and powder amount
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<blockquote data-quote="lancetkenyon" data-source="post: 1910709" data-attributes="member: 68875"><p>My electronic powder dispenser/scale is not very accurate. It can be off by as much as .3-.4gr. When a target weight is achieved, I move it over to a good RBCS 5-0-5 and trickle up. 30.0 can range from 29.7 to 30.1 actual grains. </p><p></p><p>120fps is a big ES to deal with for prairie dogs out to 300-400ish. I would definitely look at why that ES is so high. Differences in actual charge weights, along with different brass headstamps would be my guess if you are loading for bulk. I try to load my "precision" .223 w. 69 SMKs in Lake City brass only, with exactly measured charge weights to the individual kernel, and have an ES of 15. My 50 V-Max varmint loads get mixed headstamp brass, and still only have a 50 ES. That is across any other headstamp I have on hand, R-P, Win, S&B, Fed, etc.. Plenty for coyotes out to 400 though. </p><p></p><p>I use Varget for 69SMKs @ 3033fps, Benchmark for my 50 V-Max @ 3305fps from my 24" barreled gasser.</p></blockquote><p></p>
[QUOTE="lancetkenyon, post: 1910709, member: 68875"] My electronic powder dispenser/scale is not very accurate. It can be off by as much as .3-.4gr. When a target weight is achieved, I move it over to a good RBCS 5-0-5 and trickle up. 30.0 can range from 29.7 to 30.1 actual grains. 120fps is a big ES to deal with for prairie dogs out to 300-400ish. I would definitely look at why that ES is so high. Differences in actual charge weights, along with different brass headstamps would be my guess if you are loading for bulk. I try to load my "precision" .223 w. 69 SMKs in Lake City brass only, with exactly measured charge weights to the individual kernel, and have an ES of 15. My 50 V-Max varmint loads get mixed headstamp brass, and still only have a 50 ES. That is across any other headstamp I have on hand, R-P, Win, S&B, Fed, etc.. Plenty for coyotes out to 400 though. I use Varget for 69SMKs @ 3033fps, Benchmark for my 50 V-Max @ 3305fps from my 24" barreled gasser. [/QUOTE]
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Reloading
Questions about chronograph speeds and powder amount
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