Too bad .45 ACP ain't legal for hoosier deer, but is legal for hoosier squirrels, which puts it in the same category as .30-'06. The good news is: The regs are getting more complicated because we're getting more options. In the not too distant past, if you used a gun, it was "rifled slugs only in shotguns only in 10, 12, 16, or 20 ga. only". And some of the old timers remember when there wasn't even a deer season; the last known hoosier whitetail deer having been killed in 1893.