My wife has a SW Model 60-4, 38 special 5 shot Stainless Steel with a 3" bbl. What type of carry ammo (JHP) can she use? I have asked a number of people and some say standard pressure only, some say +P as much as she wants and some say no more than 30-40 rounds of +P for the life of the gun. I only use semi-autos and am not too familiar with revolvers. Any help appreciated. Thank you.