Reloaders rely on their powder scales to accurately weigh safe powder charges and check the charges thrown by their powder measures. the RCBS Reloading Scale Standard Check Weights Set allows correct readings that are essential to safe reloading. 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 (Natchez Item RC98991) of 60.5 grains for powder charges (2x20, 1x10, 1x5, 2x2, 1x1, 1x.5). Deluxe Set (Natchez Item RC98993) of 510.5 grains for bullets, cases and powder (1x200, 2x100, 1x50, 2x20, 1x10, 1x5, 2x2, 1x1, 1x.5, 1 forceps).