.45 ACP in a 1911 is best reserved for hunting burglars, murderers, and rapists, however a few people have used .45 ACP 1911's on little Texas whitetail deer with no complaints but as far as I know it was done in brushy areas and the shots were under 20 feet or so. Also I once used the fairly similar wimpy Federal .45 Colt 225 gr. lead hollowpoint load from a Ruger Blackhawk on one and it worked nicely, although there was no bullet expansion.

Does the ban also affect blackpowder percussion revolvers? If not you could probably get a Ruger Old Army and try that. I know someone in Victoria who tried an Old Army on kangaroos but it was the first time he'd ever fired a handgun in his life so he pronounced it as "useless".

Richard