TR, http://www.shooterscatalog.com/charts/hks-fit-size-chart-speed-loader.htm
The 22-K should serve for the 6-rnd K-frame versions. I suspect the 10-rnd version of the 617 leaves too little space between the rimmed bases to reliably retain the cartridges. Note however that the 9-round H&R is accomodated.
Mykl
(moving thread to the skunkworks)