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Rifles, Reloading, Optics, Equipment
Reloading
Digital Scale and Accuracy
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<blockquote data-quote="Shootin4fun" data-source="post: 692581" data-attributes="member: 28741"><p>Topgun, thank you for your comments and weighing in on the subject. (sorry, I just had to ;-) Your professional opinion is well worth considering. </p><p>Yes, the "trigger point" for a digital scale to change from one amount to the next (I think) is in fact because it IS an anlogue system at its root (something is moving, something measures that) and the movement must be converted to digits which have a specific level of resolution or "granularity". Hysteresis may also be at work in some of these systems. In fact, when I'm dropping single kernels on a RCBS beam, there seems to be a little hysteresis in that system too. But I always repeat the same actions. Weighing a charge to get it as perfect as I can, takes up to 45 seconds for me.</p><p> </p><p>coues7, your signigure line is pure psyhco/social Truth! Something everyone should remember when passing through this world of humans. I've seen it before but thanks for the reminder. </p><p> </p><p>Tracy, worthwhile story about your wandering scale too. I've been into digital electronics since '80 and these variances are the kind of thing that scares me a little when using digital scales. I've had 2 cheapies (not to suggest your VIC 123 is) and they both did things like that. </p><p> </p><p>Really, when we're talking about tiny differences in weight, like .1 gr, the <em>consistency</em> of a scale is much more important than the absolute <em>accuracy. </em>My cheapies are not as consistent as my beam, and also don't seem to be as accurate. (I have standard reference weights that were made long before anything in the world was digital.) </p><p> </p><p>For many shooting situations, a simple powder drop, or better yet a chargemaster is probably accurate and consistent enough. I used to think guys were going a little overboard by sorting brass and weighing every charge, but now I do it myself for my longer range rifles. .223 out of a mini14, probably not.</p></blockquote><p></p>
[QUOTE="Shootin4fun, post: 692581, member: 28741"] Topgun, thank you for your comments and weighing in on the subject. (sorry, I just had to ;-) Your professional opinion is well worth considering. Yes, the "trigger point" for a digital scale to change from one amount to the next (I think) is in fact because it IS an anlogue system at its root (something is moving, something measures that) and the movement must be converted to digits which have a specific level of resolution or "granularity". Hysteresis may also be at work in some of these systems. In fact, when I'm dropping single kernels on a RCBS beam, there seems to be a little hysteresis in that system too. But I always repeat the same actions. Weighing a charge to get it as perfect as I can, takes up to 45 seconds for me. coues7, your signigure line is pure psyhco/social Truth! Something everyone should remember when passing through this world of humans. I've seen it before but thanks for the reminder. Tracy, worthwhile story about your wandering scale too. I've been into digital electronics since '80 and these variances are the kind of thing that scares me a little when using digital scales. I've had 2 cheapies (not to suggest your VIC 123 is) and they both did things like that. Really, when we're talking about tiny differences in weight, like .1 gr, the [I]consistency[/I] of a scale is much more important than the absolute [I]accuracy. [/I]My cheapies are not as consistent as my beam, and also don't seem to be as accurate. (I have standard reference weights that were made long before anything in the world was digital.) For many shooting situations, a simple powder drop, or better yet a chargemaster is probably accurate and consistent enough. I used to think guys were going a little overboard by sorting brass and weighing every charge, but now I do it myself for my longer range rifles. .223 out of a mini14, probably not. [/QUOTE]
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