I was hoping for some help here, having never weighed brass before I took 50 rounds of once fired .284 brass from a new gun I had built that was trimmed, cleaned and ready to load. the brass is winchester brass all from the same bag. with the 50 rounds I came up with 3 different piles when done the brass varied in weight by 6 grains. this don't hardly seem possible to me but I have double checked on a second scale. Is this normal quality? and how much variance in weight should I allow? I am weighing on a ohaus 1110 scale so it is possible to be very exact. I do not think in this bag there would be 10 cases that would be exactly the same. NOW after finishing and sorting this is what I have out of the 49 cases I deemed good in the bag, 21 weigh 204.9 plus or minus one tenth, 9 weigh 206, 7 weigh 198.5, 6 weigh 200, 5 weigh 202.8 and 1 weighs 200 even.