Let me state up front, I am comparing apples and oranges, and I know it.
But I'm curious ... so humor me.
I've got a 10" .44, that I figure is a great deer gun out to 100yds (depending on me and the ammo). I've read around here that the recoil of a 15" .308 is comparable to a .44, I like the .308 in a rifle. So, what would the 15" .308 do for me? I admit, I don't hunt big game over 100 yds.