Calibration Weights

[Kelly Timoffee]

This is EXACTLY what I was after, thanks for the info, the hunt is now on.Unfortunately I will find another place other than WSS for this purchase.

The Lyman set consists of:
1-100 gr
1-50 gr
2-20 gr
1 10 gr
1-5 gr
2-2 gr
1-1 gr
1-.5 gr

 

[ATOM]

E-Bay handles them. At this very moment, there's an about-to-be-sold set going for cheap.

 

[rdgietz]

I use milligrams and its not that hard. the only number you have to remember is that 1 grain = 64.79 milligrams. I have a scale that measures in grams with 4 decimal places..

So lets say i need 3.1 grain of VVN320 for my 9mm load.

3.1 x 64.79 = 200.8 milligrams or a scale reading of .2008

I have a calculator that i paid 2 bucks for sitting on my reloading desk.. its an easy calculation..

And if you want to get one of those ISSO verified weights you are going to pay thru the nose for them.. I have a 100 gram weight (made in Germany) used to calibrate my scale electronically and i think it was something like $300.00 (cant remember but it was expensive).

My advice.. just get the gram weights and use a calculator..


RDG

 

[geologist]

Wear latex gloves when you handle your microcalibration weights. Acidic oils from your skin, over time may oxidize their surface changing their weight.

 

[Longshot]

I got a small calibration weight with my Mack 20.I couldn't seem to get it to hold a zero very well so I went back to my Chargemaster.Maybe I should give it another go.

 

[warrenb]

Mine does not hold zero for long either. I have to keep resetting it. Its still quicker than my beam. But I have to keep checking its zero. For the price the mac20 is not bad.

 

[senior]

He is looking for calibration weights to verify his scale. Until he verifies his scale, how can he verify the exact weight of a bullet?

I have found your average 50gn varmint bullet to be pretty much dead on for weight. My opinion is that it's more important to throw consistant loads than to know if they are all a tenth short or over in powder weight. A 50gn varmint is perfect for a quick check for accuracy of your scale to ensure it's hasn't gone poo-poo. If fact I use the same bullet stashed on my shelf on occasion for exactely that purpose.

 

[SandRoad]

And if you want to get one of those ISSO verified weights you are going to pay thru the nose for them.. I have a 100 gram weight (made in Germany) used to calibrate my scale electronically and i think it was something like $300.00 (cant remember but it was expensive).

Wear latex gloves when you handle your microcalibration weights. Acidic oils from your skin, over time may oxidize their surface changing their weight.

One electronic scale (lab balance with 4 figure price tag when new) we have is extremely precise and uses a very expensive set of weights to calibrate it. (As above, the calibration weight costs more than most "cheap" scales)

I wouldn't worry too much about using gloves with the "cheap" calibration weights. They not that precise (in micro gram terms) and are typically chrome plated to prevent corrosion. If brass then just wipe them.

The "gloves" procedure is for the extremely precise weights ($100+ per weight) where the bit of oil from your skin will throw the calibration off.....

 

[stubblejumper]

I have found your average 50gn varmint bullet to be pretty much dead on for weight. My opinion is that it's more important to throw consistant loads than to know if they are all a tenth short or over in powder weight. A 50gn varmint is perfect for a quick check for accuracy of your scale to ensure it's hasn't gone poo-poo. If fact I use the same bullet stashed on my shelf on occasion for exactely that purpose.

It's still nice to know if your scale is calibrated. Once I verified the calibration of my scale, I just watch to see that the weight of the pan stays consistent, each time I pour powder into a case.