Mr. Williams did great. This isn't the movies where someone suffers a single gunshot wound and drops dead in 2 seconds. As to caliber, most people don't carry .44 magnums. And shooting people who are running, falling, and flopping around on the ground isn't as easy as shooting paper targets.
Good shoot, though I hope the perp Williams popped through the door is the one who had the handgun. If there is an affirmative action prosecutor like the one persecuting George Zimmerman in Gainseville, Williams' actions will be scrutinized.
My exact sentiments. I have a conceal carry permit and I have been thinking about going to a small lightweight 380 instead of a 9mm. This video has made me question my original plans. I think I am going to go up to a 45 instead.