SAECO Double Cavity Cast Bullet Mould for a .378" nominal diameter, 225 grain, Round Nose, Flat Point bullet, Tapered, SAECO bullet #638. Tapered styled bullets have the front band near bore diameter tapering to slightly larger than groove diameter. This style bullet was furnished by most of the old time barrel makers such as Harry Pope. Good for 38-55 Winchester Firearms. Use SAECO Top Punch #SAE37570. APPROXIMATE Bullet Dimensions: Bullet Length-0.82"; Meplat-0.21"; Bottom of Crimp Groove to Bullet Tip-0.38",