So my son bought a Howa 22-250 (not impressed so far) and it doesnt shoot well 2" groups with 3 kinds of ammo. He wants to switch scopes to make sure that the scope isn't the problem. I have an older vortex that is a 50mm scope I have never used. I bought it to put on my 17Rem AR but it is dialed in so good I never switched scopes. So what height rings will we need? I have never mounted a 50mm scope. Will mediums work?