This lead-free, heavy 357 Magnum load generates full power plus. This load is the typical barn-burning, turbo-charged, Buffalo Bore type of heavy 357 Magnum load and should only be used in all steel revolvers. It does not have the case capacity to use a bulky flash retarded powder, thus there is noticeable muzzle flash with this load, except when firing it from the rifle, which yielded little to no flash. NOTE: It should not be fired in revolvers with a lightweight alloy frame or cylinder.