You don’t want to be a dog sitting on a porch who leaps off to chase a squirrel and gets hit by a car… there will always be instinctive reactions and emotional responses at the outset of an critical incident, by having a plan you can avoid getting sucked into a bad situation by executing an Intelligent Rational Response instead of just improvising in the heat of the moment.
It is not all that surprising then, that one of the best shooters in the world, my buddy Rob Leatham, recently posted a video (which bordered on a rant) extolling the importance of the 5th grade physical science fact: All other things being equal, a typical .45acp round delivers more energy on a target than a typical 9mm round. My own experience, experimentation and research has lead me to the conclusion that 9mm is a better choice despite its smaller diameter, lower mass and the generally lower levels of both force and momentum that it brings when compared to .40S&W and .45acp.
