[@Todd Howard]

Nah, the only all hit would be the buckshot. Obviously reduced damage compared to an explosive round or a slug, but it would hit all targets in a cone (only first ones though. they wouldn't be able to hit 2 targets in a line, one behind another. It would stop on the 1st one.)

The explosive round would hit the first target and adjacent ones. No more than 2 adjacent targets (less damage than direct round though). The explosive one would be either to cause heavy damage or no damage focusing on CC

Slug is just a really freaking big round to kill one target really dead :lol

All in all, it's up to you guys. You decide :-)
I have good ideas for both types of characters.