Gee, I'm still using the Texan balance beam scale I got in the early 70's. I've got a check weight set and check it fairly often without finding any errors. I don't weigh charges except to set up a nearly as old Lyman 55 powder measure, load for something like 11 different cartridges, and shoot lots of under 3/4 MOA 3 shot groups. Now I don't shoot 1000 yards, but the chronograph says I'm getting low ES so I guess I'm not doing that bad.