I use the hogue rubber Tamer grip on all my SRH. I replace the single grip screw in the butt with any detachable swivel stud used for rifle forearm ~ the one w/the machine threads ~ takes only one swivel loop. I found that I needed to run a tap thru the stirrup adapter nut as the thread pitch is different. I've even replaced the nut w/one of proper thread. I then drive any tapered tool, I've used the tapered shank of a pin punch (looks like a ring sizer) and even a cold cheisel thru the loop to round it out. The idea is to make the oblong loop round like a lanyard loop. This provides a practical carry, no mod other than changing the thread pitch of hogue's stirrup nut, secure carry using only single swivel and sturdy adjustable tactical sling most of which have built in bungi ~ Makes no footprint on the guns finish. Whats not to like?
I then slip the sling over head and a shoulder snap the single point clip to the swivel loop ~ ready to go.
I also have found bandolier style holsters to work well too. Thats just me YMMV