I've been using 6 - 7 oz on the body and 8 - 9 oz on the stifiner around the opening. I will say most of what I build so far is IWB holsters so it does not seem to be a problem. I can see where 8 - 9 oz on the OWB would be better. I have a cheap holster, I purchased once OWB made out of what looks like 5 - 6 oz. I really do not like how it feels. It is has a cocked and locked snap closer but it really feels to thin in my opinion. The opening colapes very easy. Reholstering the gun is dificult.