NO!!! +P is in between a standard load and a magnum, but works in any gun designed to handle it. When in doubt, look on the barrel of your gun. If it does not say +P, DON'T!!! My S&W 637 is rated for +P which is what I carry, but practice w/standard .38 loads. Not a comfortable gun to shoot with hot loads. IMHO, hot loads in a short barrel gun is a waste of money, since much of the load comes out as wasted energy/fire. And it tears up the gun.