Scale Accuracy

[Wilburt]

Yeah i want the ease for working up rifle loads. Don't have the money yet but hope to get that rcbs 1500 combo in the future. Probaly always have my 505 until it goes out (if ever) and will be sure to get another beam scale if it does.

 

[The Bushmaster]

dalepres...snuffy's and my RCBS Powder pros have a plug in power source and don't use batteries. So that solves the dead or dying battery problem. And came with their own check weights too.

 

[280shooter]

rcbs

If your RCBS goes south,just send it back to them,they fix it for free,
I had mine for over 30 years,it went south the same time my cheap franklin scale did,sent that junk back to midway,And sent the 505 out,it came back like new,Yehaoo,back into reloading again,and no more cheap scales.

 

[ar10]

I use both, a lyman electronic and the beam scale I got from Hornady that came with the press. The digital is accurate and shows to the 10ths. When I dump the powder it consistently is between 1 and 2ths higher. The thing i care about is the powder measurement is consistent each time I weigh them.

One thing I do with both scales is drop in one of the bullets. I found out that bullets have always been no more than a tenth off, which is pretty close for my work.

 

[ATAShooter]

Bought a RCBS Rangemaster 750 at 10 a.m. this morning. Came home and tried it. Returned it at 2:30 this afternoon. I'll just keep my 1964 Ohaus D-5 ( 502 model ).

 

[MCMXI]

Double post.

 

[MCMXI]

Electronic scales, like many precision electronic devices, need a stable input voltage since the output is commonly some function of the input voltage. Many modern electronic scales use a strain gauge which consists of fixed and variable resistors in some configuration such as a Wheatstone Bridge. With a fixed input voltage, as the resistance of the circuit changes due to the mass of the object being weighed, the output voltage changes. The output voltage is compared to a table of values and converted to a weight. I have my RCBS ChargeMaster plugged into a UPS (made by APC) which has a very stable output voltage. When you calibrate the scale, the calibration is only valid for the input voltage at the time of calibration. If the input voltage is fluctuating, then the accuracy of the scale will suffer accordingly. If you plug your precision scale into a cheap or old power strip or directly into the wall, the results may not be what you expected or hoped for.

In the quality lab at work I weighed a small paper clip to be .428 grams. I calculated this to be 6.6 grains. I balanced my scale to zero then set the scale to 6.6 and dropped the paper clip in the cup.

We have a Mettler analytical balance at work accurate to 0.1mg = 0.0015 grains. I think I'll try your idea to test my RCBS CM on Monday.