Was fooling around a couple weeks ago with parts I have here, and realized that the scope rail off of my Browning SA-22 will fit on the Model 25.
If I cut a dovetail at the right height in the bottom of the rail to match up to the one in the barrel, mounting can be as simple as driving a dovetail blank through both of them. And if I miss all of the holes in the rail, it will still be useable for the SA-22!
Not sure I really want a scope on this rifle, but at least I have the option available.
Alaskan, Adventurer, Engineer. 
Never hurts to have options!