Does any have one of the old T-series scopes, the ones with 10 turns of adjustment? I do not have an instruction manuel, and the way I do it is turn all the way thru, and note what numbers are best. And then back up to them, and fine tune if I don't find another spot. It seems to me there must be an easier way to do it, as far as getting in the ballpark right away. I would think the numbers mean something other than just referance. Thanks