RE: Which Varmint Gun to buy
I'd go with the .22-250 just because I don't think that for hunting ranges the .220 does that much more. If you want it to do paper along with hunting, might as well buy the .220, since it's going to give you a bit flatter trajectory, and if you're paper shooting, you'll notice the difference.
Screw the 10 ring, keep them in the zero!!!