Used to be the caseI believe Indiana is a straight wall centerfire cartridge only state with a minimum of .35 cal., that's probably why you could use 9mm to hunt deer, but I agree, there are better suited cartridges that could filled that requirement.
Anything.243 and up is legal on private property.
The straight wall thing still applies to public land but there is a minimum case length.
Never could you use a 9mm