This is a rifle specific forum so this is pretty easy. shotguns and handguns excluded!
#1 - 308 or 30-06, for me it must have iron sights.
#2 - Ruger 77/357, I love this rifle!
#3 - This last spot is a bit tough but I think it would be a decision between the 10/22 and the AR15. Both are shtf guns imo so I could choose either one on any given day.
