One of the 54 cal Hawkens I built to sell was so accurate I kept it and built another for the sale, I could some times get 2 inch groups with PRB @ 100 yds with iron sights and that is unusual in my experance.
For inlines, with a good scope I think most will shoot under an inch, but theres a lot of shooters that dont, my best is the Triump it does not seem to get that occasional flyer as oftenthat I seem to get with some.
My best conical shooter was a 22 inch barrel thunderhawk.
My worst was a CVA it shot reasonably well but broke down regular and I sure hope that there customer service has improved since then it was awful. Lee