[Roundball]

Back in the day I had a 2" Ultra Varmint mounted onto my 77V Swift. The spacing of the factory blocks appeared to be for a Lyman scope. It was necessary to drill, tap, and install another scope block to accommodate the Unertl scope. I would suggest making sure that scope would work on the factory spacing etc. The old guys that could do this work locally are all gone now. The 77V 220 Swift makes for one fine varmint rifle.