ORIGINAL: oldwun
I believe the obj lens size determines what height rings you need. For me a 40mm obj is plenty and low rings work just fine on my Omega. A lot of guys are falling into the sales pitch about 50mm vs 40mm and how much better it is. I guess it lets in more light but I have all I need in my Nikon and Leupold 40mm and 32mm.
I have a 50mm on my Omega and a 40mm on my Savage. I like the 40mm better,first it is lighter, 2nd it looks funny to see this big old scope on a MLer, 3nd you have to use the high rings with the 50mm and they are not as strong and solid shootingin my opinion. So I agree with oldwun, buty the 40mm. Chap Gleason