The Lock-N-Load Powder Measure is the only system that uses a full size powder measure that can be reset to another charge or powder with the push of a button. The unique inserts in the measure can be preset to the charge you use with the caliber you are loading. Push a button, change inserts and powder and you’re ready to go. Inserts can be adjusted for almost any charge. The most flexible (and economical) powder system available for progressive presses. (With optional powder die you never have to readjust for a caliber conversion. It switches instantly.)