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Posted: 5/21/2009 9:46:14 AM EDT
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Seems like there was a thread on this somewhere but I can't find it. So I am going to ask. I have been trying to sort my win. 308 brass by weight.
there is up to 2.1 grains difference in these cases with no real average. I was thinking of only allowing .5 difference in weight, but by doing this the only average I got was 102 cases out of 350 within this range. What is the difference in weight that anyone else is allowing, am I being to picky or what? Please don't answer like get lupua or norma. The thing is right now I can't afford lupua for short times at work. So I have to make do with what I have any good advice or insight on this would be appreciated |
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Quoted:
Quoted:
unless your going to be shooting way beyond 300 yds. i think your being to picky I will be shooting between 500 and 800 yrds! It's still a waste of time. Make matched cases with uniformed primer pockets, deburred flash holes, and turned necks. Then match the cases by measuring their internal volume. 2 grains of variation is barely 1% of the case weight; that implies a negligible change in case volume across that range. A half grain of gunpowder is about 1% of a typical powder charge in .308 Win. You might as well go through the exercise anyway. Almost everyone has to do this to find the path that suits their shooting. |
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I sort cases by–– Manufacturer, date made or lot # number of times fired case weight after all case work done ( sized, primer pockets uniformed, flash hole deburred, trimed some turn necks to uniform thicknes ) then sorted into batches ( 30, 50, 80 ) with as close a weight as posible in each batch (0.5 gr or less if posible ), best batches used for long range matches, next best for shorter range, and leftovers ( heavier and lighter odds and ends) used for practice What you are trying to do is eliminate as many diferances as posible with the buget you have |
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