there were a few RSS5 and RSS5X guns in the 2xxxxx range after the Lightweight was discontinued). The 3xxxxx range was initially exclusive to the 6.5' barrel guns but other lengths were numbered in the upper end of that range after Ruger exhausted the 1xxxxx range (the 2xxxxx range being exclusively for the Lightweight Single Six.
The convertibles started to appear around 308vxx but the frame marking did not change until 340xxx.
