As bad ass as it looks, it's actually kind of wasting if you stab a guy and shoot him again since the bullets will be decreased. Unless you stab a guy and shoot another guy, that isn't really wasting. But IMO, I don't like running forth and back from somewhere back to the blacksmith to refill bullets. I think the Extra Bullets Capacity Uplay reward is actually pretty crucial if you want to fight awesomely.
I'm sure we're all sorry to hear that you will have to run back and forth to an in-game location. As opposed to having to run back and forth somewhere IRL. But anyway, you can loot ammo off of guards now since they have rifles.