This measure was developed especially for throwing small charges from 2 to 25 grains very accurately. It IS the most accurate small charge powder measure ever produced. Each click is .03 grains, that's 1/3 of 1/10 grain per click. It is ideal for small rifles like the 17 calibers, 218 Bees, 22 Hornet, pistol and schuetzen rifles. It is not recommended for Black Powder. It comes complete with a 1.4" capacity mounting bracket, 2 drop tubes a bottle and a carrying case.