Re: sorting brass and bullet data for best accuracy
I am having trouble with the whole "case weight" thing, for example, case #17 in my most recent batch has a weight of 170.40 grains and a volume of 45.46 grains (99% iso alcohol) and case #5 has a weight of 172.88 grains and a case volume of 45.22, less than case #17.
I turned the necks on both so there should be no expansion diffs or tension issues wrt the bullet, so why would weight even come into play? isn't the whole purpose to make sure that pressure is constant and that would be more a function of volume than weight in my opinion. Now, all else being the same, I would imagine that a heavier case would have, on average, thicker body walls and that might influence expansion and therefore pressure in the case.
am I missing the obvious. . . .would not be the first time ;-)