advice on ammo 9 mm career 707

hi all, just purchased a kick ass 9 mm 707 ultra from shooting buddy Doug owen, and boy am i happy with that thing!

this is gonna be a dilemma every time i go to the range: 707 or talon ss…

Now,a question, who knows which roundball ammo it shots well?

i vaguely remember that people also use roundball ammo, some with really good results. Is there for instance 9mm shotgun ammo that will do the job/shoot straight? Am asking cause this will probably be the cheapest option.. those eun jin pellets do surprisingly well, but the extra impact you get by using roundball ammo will put an even bigger smile om my already smiling face

cheers