The good guy did well. Had his gun on his person, did not hesitate, constantly worked to improve his position, rapidly cleared a malfunction, put down the BG, stopped shooting when the threat ended, let the bad guy leave rather than extending the risk by detaining him. A reload after the BG was gone would have made it near perfect.
Second guessing his choice of weapon is nonsensical. Serious people carry semi autos for a reason but the lesson is that he was wearing his gun and knew how to use it, and did so w/ purpose.
mike r
This.
