Gun Tests magazine tested two Caracal 9mm handguns (which have since been recalled) against two 45 ACP handguns in a September 2012 showdown of self-defense pistols. The 45s were the Springfield Armory Lightweight Champion Operator PX9115LP 45 ACP, $1076, and the Dan Wesson ECO 01969 45 ACP, $1662. Here’s an…