LEE PRECISION FACTORY CRIMP DIE 30-30 90822 CRIMPS THE BULLET IN PLACE MORE FIRMLY THAN ANY OTHER TOOL. TESTS DEMONSTRATE THAT EVEN BULLETS WHICH HAVE NO CRIMP GROOVE WILL SHOOT MORE ACCURATELY. A FIRM CRIMP IMPROVES ACCURACY BECAUSE PRESSURE MUST BUILD TO A HIGHER LEVEL BEFORE THE BULLET BEGINS TO MOVE. THIS HIGHER START PRESSURE INSURES A MORE UNIFORM PRESSURE CURVE AND LESS VELOCITY VARIATION. COMES WITH A PLSTIC CASE. MADE IN USA. Gross weight: 135 grams.