The ChargeMaster Dispenser works with all types of smokeless powder and can throw 2 to 300 grain charges. Dispenses 22 grains of powder in 16 seconds. You can also store up to 30 favorite loads in memory for fast, easy recall. Includes a powder drain feature that allows the hopper to be easily emptied. This Dispenser must be used with the 110 volt or 220 volt Charge Master Scale (not included). All standard smokeless powders. Not for blackpowder. Accurate to +/-1/10 grain.