Silly question, but there you have it. I'm trying to level my scope reticle on a Mk. II rimfire, and I can't figure an easy way to get a baseline level for the rifle in my gun vise. Everything else I have has either a flat receiver that I can level to, or a flat bolt surface where I can use a level, or just pry with a credit card to align the bottom of the scope to the top of the bolt/receiver. Everything here is all rounded surfaces and I can't really get a good straight edge to level or align to. Best I can do is use a level across the lower half of the rings, and then level the scope to that - but I don't have a lot of confidence that the lower ring halves are true.

Thoughts?

KeS