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I bought a cheapo battery-powered scale to use at the range. (Frankford Arsenal). I never compared it to my RCBS digital scale that I use at home, until today.
Consistently, my rcbs was measuring 0.9gr higher than the FA scale. I used random things laying around to weigh, so the weights I tested were all over the place.... everything from 20gr to 390 gr.
I calibrated the FA scale, but it produced the exact same results. I then calibrated the rcbs, and it now reads exactly what the FA scale is giving me.
To be a full grain off, or close to it, could be dangerous in smaller cartridges, so it made me think a little bit about how often I should calibrate. What's really crazy, is that the rcbs was calibrated just last week. I used it right after calibration, then used it today for this test.... 0.9 grns off!
Just to prove that my calibration was accurate. I recalibrated both scales... both are exactly on with one another again.
I just thought it was interesting, and thought it was worth sharing, that the 2 scales were so far off, and it was the expensive (known to be accurate) scale that was off.
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FWIW, I calibrate my Acculab VIC 123 every loading session or 50 rounds, whichever comes first.
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Originally Posted by
sleepygator FWIW, I calibrate my Acculab VIC 123 every loading session or 50 rounds, whichever comes first.
From now on that's what I'll be doing.
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Calabrate and calabrate often!!!!
I actually threw my Pact scale in the garbage right where it belongs. This before I got a face full of metal at the range.
The Dillon D terminator has been super reliable. I have checked it off the MX 123 and a Denver Inst and another Acculab. Dillion is very stable and was right on with the expensive Lab scales.