I have a 1972 browning safari grade in 22-250.

It was made by Sako for Browning but it doesn't seem to be a " Sako style" receiver. The receiver is round and it looks Mauser style. A leupold standard Mauser mount does not have the correct holes.

Any idea what mount will work? A leupold part number?

Called leupold, browning and brownells tech support and everyone was of no help and I keep buying more incompatible bases.