I don't think the 120 is that old of a gun, but I will email or call Winchester to find out about the steel shot to be on the safe side.

The barrel says 2 3/4 & 3" so I assume that it will take both 2 3/4" & 3"....along with that, when would a 3" be better than a 2 3/4" in terms of hunting??

The gun will be used for skeet, but also for hunting at some point. The skeet just to improve my aim for the later.

Ok, I understand that the barrel has a MOD choke, but exactly what does that mean? Do i assume this means that the spread will be tigher?

Sorry to ask so many questions, but this gun, and well....a shotgun in general is new to me, so this is helping tremendously. I want to learn as much as I can before I go shoot it.