I think the 1.75-6 has a bit more ring mounting space than a 1.5-5. I don't see how you could go wrong with either. I'm amazed how many 336s have sky high see-through mounts.I bought a used one that even had the old pivot style mount that was hinged and you could fold the scope over to us the open sights. The scope was a Redfield 2 3/4 Wideview. The 30-30 is long gone but the scope is still one of my favorites and is currently mounted on a 45-70 guidegun.
