The .22 mag has sufficient power to kill any of those critters out to 100 yards. If you have the shot, feel confident and the conditions are right, go for the boiler room, ie, heart/lungs or straight on chest shot. I wouldn't trying to get a head shot at that distance. One may hit 2" black dots all day at the range at that distance, but there are too many variables that may lead one off their accuracy under hunting conditions. It's also more respectful and ethical, in my opinion, to not take those "iffy" shots under hunting situations. If you have a head shot at a distance you're comfortable with, then by all means, do what fits you.

For the 75-100 yard range on 'yotes, be sure to stay off the shoulder. Better yet, try to get the shots closer!

iSnipe