"...In the ball park...use a dime, thats about how much your results will be worth.
Before you go running things down weigh 20 "new dimes" on a good scale and tell me what the variation is. It's way close enough for shotgun work.
MK
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Sorry to offend. I guess I am one of those guys that doesnt like "close enough".
Mark
p.s. I did weigh 10 new looking dimes. Lightest=34.2 grains, heaviest 35.6 grains. Reweighed lightest and heaviest 3 times with same readings. The majority were within .2 grains.