wgg
.30 Stingray
Posts: 151 
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Post by wgg on Jan 5, 2017 19:38:17 GMT -5
I checked my scale with a Lyman weight set the other day. The scale was .5 grain off. What I thought was a 5.0 grain load was actually 4.5 grain load. How common is this?
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Post by bigbrowndog on Jan 5, 2017 20:50:48 GMT -5
Dust and other residue can impact accuracy especially with a balance beam scale. I routinely clean mine about every couple of months. The dust can affect the balance pivot. Also I've had issues with a stable platform to set the scale on when weighing and checking.
Fans, air conditioning etc. will all affect accuracy.
Trapr
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lws
.30 Stingray
Spokane Valley, Washington
Posts: 229
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Post by lws on Jan 5, 2017 21:14:52 GMT -5
I always balance my RCBS 10-10 scales before reloading. If it gets moved just a little bit it can make the weights off. It has its own weight to check with . Always has been dead on when it is balanced first.
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wgg
.30 Stingray
Posts: 151
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Post by wgg on Jan 5, 2017 21:50:17 GMT -5
I will give it a good cleaning this weekend and check it again, thanks for the ideas.
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Post by contender on Jan 5, 2017 22:05:43 GMT -5
I keep my scales under a hard plastic cover to keep them clean. Plus,, I calibrate & adjust with my check weight often. Best way to prevent problems.
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wgg
.30 Stingray
Posts: 151
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Post by wgg on Jan 8, 2017 19:47:31 GMT -5
I cleaned the scale, the pivot points and balanced the beam. I had to add a small piece of shot to balance the the beam. I thought that was possibly the problem, wrong. I checked the scale with my weight set. I have to set the scale at 5.5 grains to balance the 5 grain weight. I added weights up to around 50 grains and the discrepancy was consistently .5 grain. Thanks in advance for your thoughts.
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Post by DiamondD on Jan 18, 2017 5:35:50 GMT -5
That puzzles me that it would consistently be off .5 over that large a scale. I would think it would be off a percentage. So that as the weight went up the error would be larger. Hmmm.
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wgg
.30 Stingray
Posts: 151
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Post by wgg on Jan 18, 2017 10:28:12 GMT -5
I have checked it with a set of scale weights made by Lyman. I checked several weight settings and when I take it up to 50-60 grains it is between .4-.5 grain off.
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Post by DiamondD on Jan 18, 2017 21:54:57 GMT -5
Easy then, add .5 grains of solder to the bottom of the pan.
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Post by DiamondD on Jan 18, 2017 21:57:04 GMT -5
The tray the pan rests on rather.
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Post by magnumwheelman on Jan 19, 2017 6:44:53 GMT -5
just to be sure... you tried adjusting the foot through it's full range of motion to get the beam to balance???
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wgg
.30 Stingray
Posts: 151
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Post by wgg on Jan 19, 2017 7:05:17 GMT -5
I balance the beam with no problem. I was throwing light 3 grain loads and checked my scale with my set of weights. I put 3 grains of weights in the pan and to balance I had to add .5 grain on the beam.
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Dennis
.30 Stingray
Posts: 112 
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Post by Dennis on Jan 19, 2017 9:17:57 GMT -5
I balance the beam with no problem. I was throwing light 3 grain loads and checked my scale with my set of weights. I put 3 grains of weights in the pan and to balance I had to add .5 grain on the beam. What model is your scale? Dennis. |
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Post by DiamondD on Jan 19, 2017 17:53:50 GMT -5
Call RCBS they'll probably swap you a new one.
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wgg
.30 Stingray
Posts: 151
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Post by wgg on Jan 19, 2017 20:58:56 GMT -5
The scale is an RCBS 5 0 5 and I wanted to check the scale another way. I have a couple of Lee dippers so I checked and found a chart made by Lee. Using Bullseye with both dippers the scale accurately weighed the charges, giving the same weight as the chart indicated. My scale check set is evidently off.
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