I wanted a course of fire that was quick and easy to conduct and minimized ammo outlay. This indicated a single-target drill. My experience has been that some two- and three-target drills—which are my personal favorites—quickly become “too hard” to administer for groups and are not used as often as simpler single-target drills.
I recently requested and received a Kahr PM45 for test and evaluation. Although smaller than many other compact pistols, it is chambered for .45 ACP, as its name implies.