MVA MICROMETER ADJUST SCALE
This scale is adjustable in .001″ increments by loosing the knurled lock screw on the side, rotating the adjusting ring to the desire setting, and then tightening the lock screw. This scale measures .500″ outside diameter with a 7/16″ inside diameter. It is adjustable from 9 grains to approximately 125 grains of FFg powder. Some volume variation may occur when using different granulations and brands of powder.