Here is a picture of a ranger style belt.
I also do not line my gun belts. I find the belt is more than heavy and stiff enough with out lining. If I was going to line a belt I would go with a lighter weight leather.
My current gun belt project is a money belt style made of light weight leather. This belt easily conforms to my waist and does not cut into my hips. I'll be wearing it to my first match this weekend weather permitting.
Good luck with your belt and enjoy. It's fun making your own gear.
SR