I have never felt comfortable with rubber grips, even on an N frame in .44 Magnum. I like non-finger grooved Houge wood monogrips and also the Ahrends Smooth Tactical Revolver Grip (below). During extended range sessions, I wear a padded palm bicyclists glove like mountain bikers wear. The bicycle glove works far better than a rubber grip.
Ahrends Smooth Tactical grips shown on a 520 I now longer own (sobbing as I type)
