Honestly, I haven't shot the one I typically use on paper for awhile. Just always used it squirrel hunting, and had no problem with head shots.
I picked up another Mark II the other week. It was used and at a price too cheap to pass up... but I'm starting to sour on the newer Savages. Used to be a huge fan (my older Mark IIs shoot great, and I have about 6 other Savages I love), but I've had bad experiences with my last couple.
I'll have to shoot a couple of my Mark IIs soon at 50 and 100 yards and see what I get.