B Square makes a mount #42980 that mounts to your Ruger Super RH to Weaver style base ( the one listed is Target Gray ,to match your 454)
I use a set of Ruger 30mm rings with a Millit 30 mm red dot sight on my Ruger SRH 454 ,I also use a Bushnell 2-6 X 32 scope.
Johnch