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Rifles, Reloading, Optics, Equipment
Equipment Discussions
Weighing Powder - How precise is good enough?
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<blockquote data-quote="FAL Shot" data-source="post: 852053" data-attributes="member: 27328"><p>I have the new Hornady balance beam scale, and I can tell the difference when a single kernel of Varget hits the pan. I discovered that it takes about 5 or 6 kernels to equal .1 grain. I paid $65 for the scale at Midway USA. To tell me that I need to spend $700 on a scale that is accurate to .1 grain is RIDICULOUS.</p><p> </p><p>Here is a little secret: tap the tabletop of a beam balance scale as it is settling down. It removes any stiction in the bearing and lets it find true equilibrium. Remove ALL air currents from the area, don't even BREATHE while doing this, and it will be VERY accurate.</p><p> </p><p>You can also remove balance beam scale bearing stiction by playing music really loud and letting it vibrate the tabletop the scale is sitting on. Whatever works for you.</p><p> </p><p>In the clinical lab of the hospital where I was a biomedical engineer, they had a beam balance scale that could literally weigh a fingerprint, and it sat under a glass cover in order to remove all air currents from affecting its operation. </p><p> </p><p>There are plenty of beam balance scales for under $100 that can repeatably weigh to .1 grain or less.</p><p> </p><p>Electronic scales are for quickly weighing brass and bullets that can vary by several tenths of a grain to several grains.</p><p> </p><p>If your powder charge is accurate to plus or minus .1 grain (for a .2 grain span), which means about 10 kernels of most stick powders, you will never notice it in a field hunting situation, but you will in benchrest competition. For long range hunting applications, I would want plus or minus .05 grain, for a span of .1 grain high to low. The $25 Lee Safety Scale should be able to do that.</p></blockquote><p></p>
[QUOTE="FAL Shot, post: 852053, member: 27328"] I have the new Hornady balance beam scale, and I can tell the difference when a single kernel of Varget hits the pan. I discovered that it takes about 5 or 6 kernels to equal .1 grain. I paid $65 for the scale at Midway USA. To tell me that I need to spend $700 on a scale that is accurate to .1 grain is RIDICULOUS. Here is a little secret: tap the tabletop of a beam balance scale as it is settling down. It removes any stiction in the bearing and lets it find true equilibrium. Remove ALL air currents from the area, don't even BREATHE while doing this, and it will be VERY accurate. You can also remove balance beam scale bearing stiction by playing music really loud and letting it vibrate the tabletop the scale is sitting on. Whatever works for you. In the clinical lab of the hospital where I was a biomedical engineer, they had a beam balance scale that could literally weigh a fingerprint, and it sat under a glass cover in order to remove all air currents from affecting its operation. There are plenty of beam balance scales for under $100 that can repeatably weigh to .1 grain or less. Electronic scales are for quickly weighing brass and bullets that can vary by several tenths of a grain to several grains. If your powder charge is accurate to plus or minus .1 grain (for a .2 grain span), which means about 10 kernels of most stick powders, you will never notice it in a field hunting situation, but you will in benchrest competition. For long range hunting applications, I would want plus or minus .05 grain, for a span of .1 grain high to low. The $25 Lee Safety Scale should be able to do that. [/QUOTE]
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Weighing Powder - How precise is good enough?
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