A lightweight, low power compact scope like a Leupold 2.5X with relatively long (+- 5" ) eye relief and a 20mm objective is perfect for guns like yours. 2.5X is PLENTY for ranges up to 200 yards, with any short-medium range cartridge like the .30-30. You want to keep your rifle light and handy, and putting an " astronomical observatory" type scope on it defeats its' design parameters!

And you don' t have to go to the expense of a Leupold to get such a scope, either. There are other brands which don' t cost nearly as much!