Iowa has a castle doctrine. You can defend your family and property with deadly force if you deem necessary.
Iowa does not have a stand your ground law so outside of your home if you use deadly force when you have a "reasonable" means of escape or evasion you could be in trouble.
Iowa is a very gun friendly state in my opinion other then no class 3 stuff but that is a farce anyway the 68 law is unconstitutional as far as I'm concerned anyway. Second amendment says nothing about sporting use but ill get off my soap box.
Welcome to iowa.