Author Topic: Brass Selection (Read 691 times)

ButlerFord45 · « **on:** January 18, 2003, 11:17:47 AM »

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?

Coydog C. · « **Reply #1 on:** January 19, 2003, 04:00:11 AM »

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 dont trim to uniform length till after theyre fire-formed. I like 50 round lots cause thats how many holes my MTM boxes have so its easy to keep them separate. I also index my brass (and bullets) using a clock method. Each lot gets its own notch position (IE 12 Oclock, 6 Oclock) if Im shooting a lot of ammo I can separate the brass lots later.

Chuck

ButlerFord45 · « **Reply #2 on:** January 19, 2003, 06:51:13 AM »

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.

Coydog C. · « **Reply #3 on:** January 19, 2003, 02:44:18 PM »

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

ButlerFord45 · « **Reply #4 on:** January 19, 2003, 03:33:13 PM »

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.