This replacement seating stem is the perfect addition for the reloader utilizing specialty Hornady bullets like the popular FTX bullet or the supper accurate A-Max bullet. Just take out the seating stem that was installed in the Custom Grade New Dimension Seating Die and install this stem. These stems are designed for use with the caliber and bullet type listed in the description only. Additionally these stems will only work with Hornady Custom Grade New Dimension Seating Dies.