SAECO Single Cavity Cast Bullet Mould produces a .336" nominal diameter, 215 grain, Flat Nose obsolete caliber bullet, SAECO bullet #558. SAECO does not make a top punch for this bullet and recommends pan lubing. Per SAECO, this is a two diameter bullet, having the front 3 bands slightly larger than bore diameter of barrel. Rear 3 bands are groove diameter, lube grooves are rounded, without front wiper band. Approximate Bullet Dimensions: Bullet Length-1.04", Bottom of Crimp Groove to Bullet Nose-.411", Meplat-.226".