I loaded some grendel loads today and I'm concerned my scale is inaccurate.
I used the balance beam from lee precision to measure out 27.5 grains of benchmark for some 100 grain barnes ttsx. I zeroed the scale properly and measure each load meticulously, but later, to verify, I used an electronic scale to measure the loaded cartridges, but I got unexpected results.
So I weighed the loaded cartridge, then subtracted from that a spend cartridge, I get 134.5 grains. I was expecting to get 127.5 (100 grain bullet + 27.5 grains benchmark). Seems like the loaded ammo is 7 grains too heavy or my electronic scale is wildly off.
You can't weight my ammo, but you can weight a quarter (if you'd like to help).
My electronic scale says quarters (25 cents) weigh 91.6 grain on average. The US mint says quarters should weigh only 87.49 grains (+ or - 1% maybe). What does your scale say?
Thanks in advance.