I have used the same equipment since 1981. I have RCBS 5-0-5 scale and a RCBS Uniflow powder measure. For pistol, I check with the 5-0-5 scale about every ten rounds. It consistenly throws accurate charges, especially with flake or ball pistol powders. The Uniflow has some inconsistency with the larger rilfe extruded powders like IMR 4350.