This powder measure features a machined cast iron body; no other material has the heft, stability and rugged appearance that cast iron offers. The precision-machined rotor drum is cast from brass, which is naturally antistatic and spark proof. A soft elastomer wiper strikes off the metering chamber rather than cut the powder. Powder charge adjustment is accomplished with a true micrometer adjustable metering chamber. The metering chamber is aluminum with a black anodized finish and features a crisp, permanent, laser engraved scale. The brass micrometer thimble is engraved with .01cc graduations and has a releasable detent lock. With most rifle powders each click is about a 1/10 of a grain, perfect for working up a load. It features an easily removable 1/2 pound capacity hopper with an on/off valve so you can quickly return unused powder to its original container or switch to another type. The hopper feeds to a pre-measuring chamber allowing precise charges regardless of the powder level in the hopper, no additional powder baffle required.