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Rifles, Reloading, Optics, Equipment
Reloading
Beams or Digital?
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<blockquote data-quote="Fitch" data-source="post: 324180" data-attributes="member: 19372"><p>I bought a ChargMaster 1500. I bought it because powder should be measured by weight, not volume. I've been dissapointed by it's accuracy and repeatability. I weighed every charge that came off it on my 10-10 and found it to be no better than +/- 0.2g and some times worse. Looking at my shiny new $300.00 instrument I wondered what had happened to my 10-10? I always set the 10-10 using check weights at the nearest half grain. Perplexed, I had a friend bring over a very expensive lab scale (+/- 0.01g) to see what was going on. </p><p> </p><p>We checked the check weights and found they were right on. The 10-10 repeats within 0.05g. The bottom line is that the Ohaus 10-10 that I've had for 30 years, used in conjunction with the check weights, is a whole lot more accurate and repeatable than the 1500 I bought. This may not always be the case, but it is the case with mine.</p><p> </p><p>Now I set the ChargeMaster 0.3g low and trickel to weight on my 10-10. The output of the Charge Master varies from 0.3g low to reading zero on the 10-10, and now and then will be .2g over which is a 0.5g variation. </p><p> </p><p>I am glad I have the ChargeMaster, it is really fast for pre-measuring charges (which get weighted on the 10-10) to run ladder tests, and much faster to set up as a pre-measure than either of my volumetric throws (Lyman 55, Redding BR3). But I do not pour powder into the case directlly from it, ever. I weigh it on the 10-10 first.</p><p> </p><p>What is so frustrating is that if I put the check weights on the charge master, it gives me the right answer. That is because the weight falls in the middle of a sampel range for the electronics. But when it is trickling to weight the digital thresholds get into the act and it will sometimes switch just as it crosses the threshold (which will be low). Or because of dynamics and some clumping of the powder it will switch after it is past the window. I don't think the industry has gotten it "right" yet with the automatic power dispensors. They are close, but not close enough for someone who needs a low ES for repeatability at long ranges. </p><p> </p><p>YMMV.</p><p> </p><p>Fitch</p></blockquote><p></p>
[QUOTE="Fitch, post: 324180, member: 19372"] I bought a ChargMaster 1500. I bought it because powder should be measured by weight, not volume. I've been dissapointed by it's accuracy and repeatability. I weighed every charge that came off it on my 10-10 and found it to be no better than +/- 0.2g and some times worse. Looking at my shiny new $300.00 instrument I wondered what had happened to my 10-10? I always set the 10-10 using check weights at the nearest half grain. Perplexed, I had a friend bring over a very expensive lab scale (+/- 0.01g) to see what was going on. We checked the check weights and found they were right on. The 10-10 repeats within 0.05g. The bottom line is that the Ohaus 10-10 that I've had for 30 years, used in conjunction with the check weights, is a whole lot more accurate and repeatable than the 1500 I bought. This may not always be the case, but it is the case with mine. Now I set the ChargeMaster 0.3g low and trickel to weight on my 10-10. The output of the Charge Master varies from 0.3g low to reading zero on the 10-10, and now and then will be .2g over which is a 0.5g variation. I am glad I have the ChargeMaster, it is really fast for pre-measuring charges (which get weighted on the 10-10) to run ladder tests, and much faster to set up as a pre-measure than either of my volumetric throws (Lyman 55, Redding BR3). But I do not pour powder into the case directlly from it, ever. I weigh it on the 10-10 first. What is so frustrating is that if I put the check weights on the charge master, it gives me the right answer. That is because the weight falls in the middle of a sampel range for the electronics. But when it is trickling to weight the digital thresholds get into the act and it will sometimes switch just as it crosses the threshold (which will be low). Or because of dynamics and some clumping of the powder it will switch after it is past the window. I don't think the industry has gotten it "right" yet with the automatic power dispensors. They are close, but not close enough for someone who needs a low ES for repeatability at long ranges. YMMV. Fitch [/QUOTE]
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