A few quick change conversion kits for Dillon 550. 357, 44 Mag/44 Spl, 7.62x39 (no die box), and 10MM/40SW die set with tool head , no shell plate with is $160. Pistol caliber have carbide sizers. 1 Complete kit is $225. A 10MM/40 S&W die set with tool head $125.  Shipping for complete kit is $30.