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Rifles, Reloading, Optics, Equipment
Reloading
Digital Scale and Accuracy
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<blockquote data-quote="TracySes23" data-source="post: 692222" data-attributes="member: 52763"><p>Digital measuring equipment of any kind always has built in inaccuracy. If it reads in .1 increments, it can possibly be in the unknown area inbetween increments and it could be off as much as .09 either way before it trips over to the next number. That gives it the potential inaccuracy of .18. Only if the device reads in .01 increments can you depend on .1 accuracy. I've proved this concept to a number of people over the years since digital micrometers and indicators came out.</p><p>For these reasons I never trust digital anything to be as accurate as the smallest increment on the instrument.</p><p>I have seen a few instruments that will display a + or - to indicate if you're off on either side, but you still don't know exactly how much you're off.</p><p>A beam scale can also be off, but if it's pivot points are sharp & clean, it should always be reliable.</p><p>From personal experience, I've discovered you can read a beam scale while it's still swinging after it's settled down some. It will swing very close to plus and minus equally on both sides of zero. It does however take a bit of practice to be consistent. If you have doubts about how well you can do this, simply allow it to completely to settle down and check your progress as to how well you doing. I read this in a gun magazine over 30 years ago.</p><p>You can also learn to use your finger to make it settle down faster. This works well, but also takes practice. However I have discovered that with proper powders and the right chamber size in a good powder measure, you can depend on measured loads within .1 grain. This has been especially true for me with pistol powders, from Bullseye up through 2400 & 4227. I've never used ball powders, but I've been told most of these measure very accurately through powder measures. I've also never used any powder slower than Dupont 4320.</p><p>My powder measure is an Ohaus DU-O Measure. It has a small chamber for pistol powders and a large chamber for a larger charge of slower burning rifle powders. Maybe some of the newer measures have this dual chamber capability. I know I love my powder measure. I bought it in the late 60's or early 70's.</p></blockquote><p></p>
[QUOTE="TracySes23, post: 692222, member: 52763"] Digital measuring equipment of any kind always has built in inaccuracy. If it reads in .1 increments, it can possibly be in the unknown area inbetween increments and it could be off as much as .09 either way before it trips over to the next number. That gives it the potential inaccuracy of .18. Only if the device reads in .01 increments can you depend on .1 accuracy. I've proved this concept to a number of people over the years since digital micrometers and indicators came out. For these reasons I never trust digital anything to be as accurate as the smallest increment on the instrument. I have seen a few instruments that will display a + or - to indicate if you're off on either side, but you still don't know exactly how much you're off. A beam scale can also be off, but if it's pivot points are sharp & clean, it should always be reliable. From personal experience, I've discovered you can read a beam scale while it's still swinging after it's settled down some. It will swing very close to plus and minus equally on both sides of zero. It does however take a bit of practice to be consistent. If you have doubts about how well you can do this, simply allow it to completely to settle down and check your progress as to how well you doing. I read this in a gun magazine over 30 years ago. You can also learn to use your finger to make it settle down faster. This works well, but also takes practice. However I have discovered that with proper powders and the right chamber size in a good powder measure, you can depend on measured loads within .1 grain. This has been especially true for me with pistol powders, from Bullseye up through 2400 & 4227. I've never used ball powders, but I've been told most of these measure very accurately through powder measures. I've also never used any powder slower than Dupont 4320. My powder measure is an Ohaus DU-O Measure. It has a small chamber for pistol powders and a large chamber for a larger charge of slower burning rifle powders. Maybe some of the newer measures have this dual chamber capability. I know I love my powder measure. I bought it in the late 60's or early 70's. [/QUOTE]
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