Buffalo Bore Ammunition 37A20 Heavy 327 Federal Magnum 100Gr Handgun Ammo - 20 Rounds - Buffalo Bore's 327 Federal Heavy ammunition is a full power load that utilizes a flash suppressed powder, so the shooter will not be blinded by his own gunfire should the hammer be dropped in a low light situation. This ammo is safe to shoot in any all steel revolver or standard pistol.