The Lee Precision 6 Cavity Mold .99 Caliber produces a .358 diameter 150 grain round nose bullet suitable. Its made from aluminum because of the exceptional molding qualities. The mold cavities are lathe bored for unmatched roundness and size control. It will achieve a roundness of .001 or less. Ballistic Coefficient = .131 Bullet Overall Length = .643 inches Distance from crimp groove to the nose of the bullet = .288 inches