I asked this a while back on here, got conflicting reports. Many on the Wilderness like the 22 mag, some like the 17. When I asked on the main forum, it was split about 50/50, with many on one side condemning the other as obsolete, the other side replying that one was a solution non-existent problem. And from some of the research I did and research others showed on here, it seemed like a push to me. It came down to availability of ammo and the firearm I wanted to use. I wanted a Henry lever, and the 22 mag is more common in the village (I plan on spending time there again at some point.) So I got a Henry Lever 22mag and put a Nikon fixed 4 power scope on it, and am very happy with it's performance at the range so far. I've only taken 1 grouse with it, but the bullet went right where the cross hairs were. As far as ballistics for them, from my understanding the 22mag hits harder because it's heaver in the range your talking, but the 17hmr will go farther but because of how light it is it's subject to wind drift and losing punch further down range. I'll see if I can dig up the thread I started on this very same thing a while back, there should be some graphs and links to ballistic charts in them.
Easily amused and loving it.