My Smith 637 Airweight is far and away the hardest gun to shoot well I've ever fired. I took it to the range with a box of +p 158gr SWLHPs. Two rounds and I was done. I tried some standard pressure range ammo and it was still an unpleasant experience, but tolerable. I shoot it best with Federal's low recoil JHPs, best being a relative term ... lightweight guns are great to carry, but if you dread shooting them, you probably won't train with them, making it a serious mistake to have them with you in a dangerous situation. I carried the Smith for a while, but I'm back to my favorite lightweight, the Kahr PM9, which I shoot very well.