Double, I have a .25-20 Win 92 rifle (original), a Savage 23B (very late and in great condition but with a Savage sidemount added) and a Win Single Shot made from Winder parts and others (a true "parts gun" made of "parts guns"). I don't shoot the '92 much any more but do shoot and handload for the others. Only problem I find with the .25-20 is that it ricochets very badly and noisily. Not a problem if you hit what you're shooting at but a consideration in populated places (people OR stock). There I use .22 Hornet or .22 WRM. Good luck with finding either of those .25-20s in at a decent price, but you never know. Another neat .25-20 is the Husquvarna (sp?) bolt single shot. And you can make a very neat one by relining or rebarreling a Martini Cadet.
Sounds like you may need a scope--I can only shoot my Win SS because it has a 28" barrel and a tang sight. And I may be stuck with the scoped Savage only soon....it has a Weaver K3 which works for me.