The RCBS Uniflow Powder Measure is a solidly constructed powder measure that throws consistently accurate powder charges. This small 500 diameter adjustment screw replaces the small metering screw on old style RCBS Uniflow powder measure.
Fits: RCBS Uniflow Powder Measure (Sold Separately) with a measuring cylinder with a 1/2" diameter metering chamber. This is the older style Uniflow Powder Measure. Function: 17-20 Caliber Drop Tube
Notes: Large micrometer adjustment screw, product # 654966 fits current style RCBS Uniflow powder measure with a measuring cylinder with a 11/16" diameter metering chamber