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Discussion Starter #1
I just finished weighing a little over two hundred pieces of 45-70 brass, two different manufacturers are about 25 grains apart. That there is a difference is not a suprise, that much difference was. The real suprise came from as much as 12 grain difference from the same manufacturer. I had thought they were from the same lot because I bought them at the same place and time.
Now my question, what varience do you allow for working up a load in a new rifle? I have 12 pieces within .2gr, is that too close, should I allow more difference?
 

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BF,

My Buff Arms 2.6” brass has a variation of 6.1 grains for 300. So I broke it down into 50 round “lots” for a variation of 1.0 grain per lot with a “practice” lot with a 2.0 spread. My Starline 2.4” brass has a variance of 2.4 grains for 250 pieces. When I broke it down into lots the largest lot variation was .7 grains, the AVERAGE was .3 grains.

I usually; get a new batch of brass in, uniform the primer pockets and debur them. Then I weigh them and segregate into lots. I don’t trim to uniform length till after they’re fire-formed. I like 50 round lots cause that’s how many holes my MTM boxes have so it’s easy to keep them separate. I also index my brass (and bullets) using a clock method. Each lot gets it’s own notch position (IE 12 Oclock, 6 Oclock) if I’m shooting a lot of ammo I can separate the brass lots later.

Chuck
 

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Discussion Starter #3
Thanks Coydog. I did find out yesterday that I don't like my balance beam scales as well as I thought! I'll go back through them later today.
 

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BF,

The Electronic and the Balance Beam both have a place on my bench! I use the electronic for weighing brass and bullets. For powder I still prefer my old RCBS 10-10 scale. The electronic drives me nuts when I'm trickling powder and it jumps a couple tenths. I like that nice steady magnetic dampened pointer!


IMHO, for tedious repetitious weighing of lots of “stuff”, nothing beats and electronic! :grin:


Chuck
 

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Discussion Starter #5
I guess that means another damn cookie jar that's gonna want it's share of my pennies. I believe that the speed in just weighing stuff would make them well worth their cost.
 
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