RCBS LUBE A MATIC SIZER .356 DIE

RCBS dies in this size (.356, .357, .358) have one dept for their lube holes. This means it is best for bullets with a single large lube groove. The Lyman dies, which work in the same machines (the Lubrisizer and Lubamatic) have multiple depths and so work well with bullets with multiple lube grooves, but they are more likely to leak lube or contaminate crimp grooves, particularly with short bullets. It's good to have both kinds.