:)Dan,
I don't have any experience with the R55, never saw one. But I do have a Classic 24XX serial, never jams can shoot into 1/2 inch at 50 with high speed SGB's. Kills squirrels like crazy when feed the right ammo. I have seen the posts bitching about how bad they are and I shake my head wondering do I have the only good one in captivity. If the R55 is supposed to be an improved version INHO it must really be great, a good smith can get the trigger down to 2 to 2.5 pounds and it's really sweet then. Sorry I can't be of much help.
Len