This ammo is safe to shoot in any all-steel 357 revolver, including J frames. This ammo is no harder on guns than any other normal 357 ammo. This ammo is safe providing the gun is in a 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 won't hurt these super lightweight revolvers.