How much did he actually shoot in the cc class? I suggest finding a gun club or gun store where he can fire several different makes, models and calibers. Be aware that a short barrel will affect velocity which may affect the bullet performance. Some bullets do not expand well when shot from a short barrel (less than 4") handguns. If that happens, the bullet basically acts like a FMJ; and you may have over-penetration. Over-penetration is not something you want to happen.