I have a S&W 500 4" and had a holster made by Black hills Leather. I went with a high ride hip holster and it carries and feels like my CCW gun. I use an AKER belt with a polymer liner which prevents sagging,
www.galls.com. I have had many holsters made by Rudy Lozano (black hills leather), they are well made,durable, fit perfect, and he is great to work with. He will add/subtract features that you like and guarantees his work. His prices are excellent, you end up with a custom holster for less than most of the big name stock items. Good luck.