Here's an update on my scale and weights.
I got my wisdom teeth pulled Friday morning so yesterday I was out, today I was mostly functional, so I took my RCBS (Ohaus) 304 scale apart. Not the easiest thing to do, even on pain killers. But I took a bunch of time and got it done.
I didn't know that these things have two pivot points, the main one, and also the pan hook has another pivot point, or a second set of knife edges.
I ended up looking at both (the pan hook was a pain to get apart) and both had damaged edges. It was hardly noticeable that they were damaged, but you could feel it. I broke out the 1,000 grit sand paper and cleaned up all 4 edges and q-tipped the stones clean, and put it back together.
Up to this point, the scale was wondering 0.2-0.3 gr and it would not settle on the same spot twice. After I cleaned up it it works flawlessly. Settles on zero every time and I also got a set of weights to check.
I picked up a couple weights in grams from some electronic scales a friend had laying around. 10, and 50 g. I have not weighed them on the analytical scale yet, but did the quick conversion. 15.432 gr per g. So 50g = 771.6 and 10g= 154.3. I threw them on the scale and they were both 0.1 gr light. Tried this a couple times and both times dead on 0.1 gr light. I grabbed my cheap Hornady electric scale and they both weighed 0.005 g light. That correction factor brings my 304 scale dead on.
I'll mess with it again tomorrow and check some bullet weights, but I think I got my scale fixed.
I got my wisdom teeth pulled Friday morning so yesterday I was out, today I was mostly functional, so I took my RCBS (Ohaus) 304 scale apart. Not the easiest thing to do, even on pain killers. But I took a bunch of time and got it done.
I didn't know that these things have two pivot points, the main one, and also the pan hook has another pivot point, or a second set of knife edges.
I ended up looking at both (the pan hook was a pain to get apart) and both had damaged edges. It was hardly noticeable that they were damaged, but you could feel it. I broke out the 1,000 grit sand paper and cleaned up all 4 edges and q-tipped the stones clean, and put it back together.
Up to this point, the scale was wondering 0.2-0.3 gr and it would not settle on the same spot twice. After I cleaned up it it works flawlessly. Settles on zero every time and I also got a set of weights to check.
I picked up a couple weights in grams from some electronic scales a friend had laying around. 10, and 50 g. I have not weighed them on the analytical scale yet, but did the quick conversion. 15.432 gr per g. So 50g = 771.6 and 10g= 154.3. I threw them on the scale and they were both 0.1 gr light. Tried this a couple times and both times dead on 0.1 gr light. I grabbed my cheap Hornady electric scale and they both weighed 0.005 g light. That correction factor brings my 304 scale dead on.
I'll mess with it again tomorrow and check some bullet weights, but I think I got my scale fixed.
