Buffalo Bore Ammunition Outdoorsman .357 Magnum 180 Grain Hard Cast Flat Nose Ammo. ammo adds more power than ever before to the 357 mag. This ammo is safe to shoot in ANY all-steel 357 revolver including J frames. This ammo is no harder on your gun than any other normal 357 ammo. This ammo is safe providing the gun is in safe condition for use with any normal 357 ammo. This ammo is not recommended to be fired in super light alloy revolvers the recoil is severe enough to cause crimp jump but the ammo itself wont hurt these super lightweight revolvers. Specifications for Buffalo Bore Ammunition 19A/20 Outdoorsman .357 Magnum 180 Grain Hard Cast Flat Nose Ammunition: Manufacturer: Buffalo Bore Ammunition Caliber: .357 Magnum Number of Rounds: 20 Bullet Type: Hard Cast Flat Nose (HCFN) Bullet Weight: 180 grain Cartridge Case Material: Brass Muzzle Velocity: 1400 ft/s Application: Protection Primer Style: Centerfire Package Contetns: Buffalo Bore Ammunition 19A/20 Outdoorsman .357 Magnum 180 Grain Hard Cast Flat Nose Ammunition