I look for constancy in my reloads. My first reloads were for a scoped Lee Enfield using Rem brass. I shot !" groups with that. My second example is my Browning 40cal HP. I'd weigh and separate the same brass by manufacturer. I'd weigh and separate the bullets too. For fun, I shot at clay pigeons at 100 yards. I didn't hit the clay pigeon every time but if I was shooting at someone, he would be running for cover. And last, I reloaded for a 1910 Target Swedish Mauser with aperature sights. I weighed and measured all the Norma brass I had; then, did the same with the bullets, then measuring the concentricity of the cartridge so they'd chamber the same way. I got a dime size group at 200 yards. I like petloads shot from a bench and knowing what my gun can shoot at its best. Anything causing a larger group from anything three positions is my fault.