The Hornady Lock-N-Load Powder Measure Handgun Rotor and Metering Assembly is perfect for the reloader using their Lock-N-Load Powder Measure to meter precise charges for handgun or small capacity rifle cartridges. This assembly comes with the handgun rotor and metering assembly. For even greater precision you can use the optional handgun micrometer with the handgun rotor (product# 615-914). Notes: Smaller chamber meters accurate charge weights between .5 to 17 grains.