Half a grain? They're all within half a grain. They're all within .2 grain without sorting the brass. Using commercial jackets they're all identical. I swage all my cores to a consistant weight, the as cast cores are +/- .4 grains after the cores are swaged, they're all the same, the only thing that varies is the fired .22 brass and they're within .2 grains. I have friends out west that shoot these at prarrie dogs at 300+ yards with good sucess. I have good results shooting at paper at 200 yards.