Reelman, I had a HELL of a time finding bases for this rifle! The standard bases for the pre-64's would not work for it. I ended up using Talley steel bases for the Winchester Model 70 (.435" rear measurement and .865" fronts) Pre 64 Long Action Magnum (Double Extended Front) - 25XX704 - and 1" Screw Lock Detachable Rings in Low / Matte - M200003.

Here's the thread from 2010.

Eric