The HSR is leather so it will wear the finish. Any soft material will retain any dust or grit and scratch things up as well. The hard Kydex, like Comp-Tac uses, retains grit the least and is easiest to clean but if you do get any dirt in it and don't clean it out can really scratch things up. Probably the softest holster material will be nylon.
Check with Bob Mernickle. He can line his holsters with suede or possibly pig skin which are both very soft.
go the custom route, and get something that will be wxactly what you want. I tried to post some pics, but am not being able to.If its a 4 5/8 SBH, I have a couple on hand. Oned strongside, ones a crossdraw. They are both lined for mininum wear to the guns finish.
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