http://www.youtube.com/watch?v=sPi8UG3dlF4#t=5m40s I know there is 3 basic types of shot bird, slug, and buck. If there are anymore out there I would like to know, but I think that is pretty much it. I would also like to know what shotguns would you like to see in Fallout:NV? (other than the ones he have already seen of course)
For me I would like to see the Winchester Model 1897 Trench Grade.
The most lethal of the shotgun rounds (at medium/long range) are the Sabot Slugs. Not quite the same as a regular slug, and usually used with a Rifled Choke Tube - but the range over a regular slug is at least 50% farther with good accuracy. Of course modern ammunition usually makes their Sabot's in hollow-point (like the Winchester Dual Bond or XP3 Sabots). They are good up to 100 yards at least and travel at ~2,000 fps (which is getting into rifle bullet range) and can drop just about anything short of an elephant or rhino in the first shot.
Maybe too advanced for a Fallout universe, perhaps this will be something we mod into the Weapon Mod Kits once the game is out..
I personally LOVE shotguns, and take my Maxus around with me like Linus's blanket, so I can't Wait to see the new ammo types and expanded shotguns in New Vegas!
Miax