Lyman Double Cavity Cast Bullet Mould producing Lyman Pistol bullet #258665, .358" nominal diameter, 158 grain, Flat Nose bullet. Designed for Cowboy Action. Will function and give good accuracy in both rifles and pistols. Bore riding nose for alignment of this bullet has been widely copied. Lyman Top Punch #495, Item#LYM2786769. Approximate Bullet Dimensions: Bullet Length-0.69", Bullet Nose Length-0.33", Meplat-0.25".