Now I know these aren't leather, and they don't look as cool next to your oak/leather case when you are showing off the double to your buddies, but they are inexpensive, functional and they hold the round ready for easy access.

I've used this rig since '96 and it's never failed me.
Another nice feature is that you can load up several for a fast swap for solids or softs or different calibers!
Belt and holders come from Uncle Mikes!