For those that shoot the cast bullet benchrest matches, I would assume you weigh each bullet after casting to cull those out of.........? So my question is, how much plus-minus do you keep?
I don't go too crazy, I just use my chargemaster to weigh each bullet. I make a pile of each per tenth of a grain, and see how they play out. To me, I pick the "middle" weight, then give 2 tenths plus and minus, for my 200 yard bullets. Depending on how they all weigh out, I give a little more variance to shoot 100 yards.
The bullets that are out of the "good", I keep and powder coat those a different color and use for fowlers after cleaning the barrel.
As a bit of an aside, on another thread, it was asked about GC before or after PC. I seat before, I use a seater I made that is drilled and reamed to bullet size, with a small cut for the GC in the bottom. I seat the GC using an arbor press, then shake and bake. Never had a GC come off.