The heart of the Hornady powder dispensing system are the powder measure inserts.

Each measure will be supplied with one insert. It is possible to use the same insert for all your reloading, and recalibrate it every time a new powder type or charge is required.

A more efficient setup is one insert per powder configuration most commonly used. A powder configuration being a mass in grains per type of powder.

Note that there are two types of powder measure inserts in the box. On the top left, the inserts have a mushroom shaped ends. On the right, dowel shaped. The first type is more suited to large volumes of powder, such as rifle. This insert can dispense in excess of 100 grains of powder.

The second type is more suited for smaller volumes such as in pistol reloading, and can easily dispense from a fraction of a grain to around .223 Remington case capacity.

There is an insert available that can dispense up to 265 grains of powder, used for reloading the .50 BMG.

There's a button on the rotor, that disengages the insert. Empty the powder from the measure before doing this.

Press the button in.

Take the metering insert out.

Put in the required insert. Very usefull for changing from one measure of powder to another, without having to re-calibrate the entire powder dispensing system.