I am not a moderator, but welcome to the forum Yellowglider. There are no "stale" questions, just bide your time on replies, someone will answer you. As to the ring height, that will vary as to how the rifle fits you at the cheek weld, bolt clearance, and how close you want the objective end of rifle to the barrel. I have found the if I use a medium height ring, my cheek weld position is good, bolt will clear and have a good distance between the objective and the barrel. Hope this helps, and kudoos to viking for giving you the link to Rimfire Central.