You rely on your scale for safe, accurate powder charges. Over time, accumulated grit and dust can affect accuracy. A quick test with RCBS Scale Check Weights will tell you if your scale is reading correctly. Sets include: Standard set of 60.5 grains for powder charges (2x20, 1x10, 1x5, 2x2, 1x1, 1x.5). Deluxe set of 510.5 grains for bullets, cases and powder (1x200, 2x100, 1x50, 2x20, 1x10, 1x5, 2x2, 1x1, 1x.5, 1 forceps).