RE: Push feed, or controlled round feed?
I forget what the Tikka is at the moment, but as far as I'm concerned, why does a guy need a push feed? (I might have this backwards, it's kinda hazy right now, so correct me if I'm wrong: push doesn't have to be loaded from the magazine.) Basically the only thing that that helps you do is load the rifle to full capacity without closing the bolt, opening and loading a final shell, which shouldn't be done anyway. It always makes me nervous when guys walk around with their magazines full and a round chambered, it's just not safe. I'm thinking the TIkka's are push though, but I'm not for certain. I think Prairie Boy is a big Tikka guy, maybe ask him?
Screw the 10 ring, keep them in the zero!!!