Re: Max range of a 22mag on a hog?
I'd have to say the max range is simply the furthest distance you can land the little bullet in the ear hole.
If a steady rest is the issue, get yourself a pair of shooting sticks (I prefer Stoney Point) to take along on the hunt. If you get the medium or high model, you can just use it as a walking stick until you're ready to take a shot. I've been doing it for coyotes, deer, gophers, etc. since I was 15.