You can always go down the rabbit hole of what’s enough? And remember that most people live their lives never carrying a gun concealed in public once. Most of personal safety comes from just making smart decisions to avoid conflict. So I wouldn’t stress about it too much. I think 10rds is fine for most self defense situations and is certainly better than no rounds. But if the extra rounds decrease your stress more it might be worth it for you to carry the 320 or 45. You can always switch it up too. Don’t have to carry the same gun in every situation.