RCBS Lube-A-Matic Lube and Sizer Die 310 Caliber (.310 Diameter)

RCBS Lube-A-Matic Lube and Sizer Die (.310″ Diameter) is a great and easy way to lubricate bullets even with today’s hard lubricants. It features hardened interior insuring alignment for perfect cylindrical shape. Fits RCBS Lube-A-Matic-2 Bullet Sizer/Lubricator and the Lyman 450/4500 Lube Sizer. Sizer dies also help to crimp the gas check on the base of gas check style bullets.