When sizing jacketed bullets, the Lee Classic Bullet Size Kit can be used on a press that accepts 7/8" x 14 threaded dies and uses universal shell holders. Adjust the die into the press so that the punch just barely pushes the bullet through the sizing portion of the die. This will utilize the maximum leverage available in the press lever linkage. Jacketed bullets must also be lubricated with a quality lube like Lee Resizing Lubricant 90006 (which is also a lubricant for cases).