I've got a big 50 that I rarely shoot, but I'd like to shoot it a lot more often. The problem is finding a place to shoot it safely. I joined the local shooting range a couple years ago, and when I signed up I specifically asked if shooting a 50 was allowed, and was told that it is. The second time out one of the other shooters pointed out a sign that I hadn't read that said "no 50 BMG." I brought it up with the BOD and apparently I was given bum dope by the guy I originally spoke with. I still enjoy the range and take other rifles there, but darn it!
And like Chucktshoes above, I have an unfired AK that I got when my father died 20 years ago. I've not even bought ammo for that rifle. I take it out of the safe to fondle it once in a while.
With the scarcity of reloading components these days, it sure likes like it'll be a lot more expensive to shoot anything often! I was looking for some large magnum rifle primers and slow powder last week and found exactly NOTHING.