NBY,
I've had the same experience with my Ruger # 1's. they always seem to shoot under an inch. I do have some tuned up ones that will usually shoot half inch and sometimes less, the cost was not all that much when compared to other single shot rifles. Here's what I did.
It's not hard to find a nice used Ruger # 1 Rifle for around $ 550., put in a decent adjustable three screw trigger, about $ 75. installed, put in a speed hammer and spring, $ 60. installed, put on a good Douglas barrel for about $ 325., you now have about $ 1000. into a rifle that if you do your part should shoot under an inch, you should have no problem selling the original factory barrel for about $ 75., and get about $ 40. for an original factory hammer, that will bring your cost down to about $ 875. / 885., even if your gunsmith pushes you to the $ 1000. mark because of ? it would still be ok, try doing that with a High Wall or most any other good rifle, I think you will be well over the $ 1000. mark.
Some seem to think that the problem with the # 1 is the hanger, a good gunsmith will use that hanger to tune the barrel for a very high degree of accuracy. The Ruger # 1 guys over at the Ruger # 1 Group at
(You need to Login or Register to view media files and links) have been having a shoot every year since 2005 for # 1's only, they have four different category's that range from the small bores ( 22 Cal ) on up to the big bores ( 45-70 Cal ).
Some of the guys in that group have written some very good articles on how to squeeze the last bit of accuracy out of a # 1 and are always experimenting with different things to improve it even more. The articles are archived in the Files section of the group for all to read and comment on.
Continued Later.