Hi, I have a C-9 and a some other 9mm pistols. However I would like to get a carbine. Perhaps to do very light hunting. Also I hand load. So what changes would one make to the rounds to make them more suitable for a carbine? I'm sort of leaning toware the .40 cal. That would give me a real good reason to get a 40-SW-B. But on the other hand, I do have gobs of 9mm ammo. On the other hand (I'm a range scrounge.) I have found at least 200 once fired .40 cal cases. Any Suggestions? Cures?