I recently purchases a S&W 637 (Airweight Chief's Special) and I'm looking for self defense ammo for it. My first choice would be Speer Short Barrel Gold Dot 38 Spl +P, but I've heard you should limit the amount of +P ammo shot with the S&W Airweights? Is this true? If so, what other SD ammo (non +P) would people recommend?