You may have misunderstood my post....
The good guy had only 5 shots, he used all five and three hit the target. That's 60% and actually probably very good for being 90 years old and under attack!
But what if he had an M&P 9mm with 18 rounds available? At 60% success ratio the bad guy would have taken 12 rounds! I would think 12 rounds in the belly would hurt more than 3 rounds. Maybe enough where the bad guy would consider leaving the scene because the lead just keeps coming his way.
I would like to ask the old man if he wished he had more than 5 rounds available.
OK. What I think you're saying is that if the man had an 18-shot handgun with the same hit ratio of 60%, resulting in 12 hits instead of 3, that it would've been more effective.
Again, there's no guarantee that even those 12 hits would've worked. I know of one incident, I believe involving the Illinois State Police, where two officers armed with 9mm pistols fired on their attacker and got 13 hits. The attacker finally stopped. IIRC, it wasn't until EMS arrived that he went unconscious. I believe the attacker ultimately survived.
Even in this instance, based on what I read in the article, the attacker continued his attack after being hit 3 times. That tells me he was determined to attack his "victim". Would that determination have given him the strength to attack after being hit 12 times in the abdomen? I don't know.
Let's look at some other issues. How long would it have taken the man to fire those 18 rounds to get those 12 hits? Now how long would it have taken for the attacker to close the distance? Would the man have even been able to fire 18 rounds before then? What if those 12 hits were in the chest? What if he sprays-and-prays because of the higher capacity and ends up with an even lower hit ratio? Is the man firing in a solid 2-handed stance or in a 1-handed stance? Are one or both parties moving? What if in a panic the man didn't grip the gun correctly and caused a jam after only firing a round or two? This is before we consider the attacker's build, mental state, clothing, and whether or not drugs are in his system. As I said, there are a lot of variables and it's impossible to account for them all. Whether you have 2 rounds of the cheapest, weakest ammo in your gun or 20 rounds of the latest high-tech wonder bullet, they may work or they may not.
I'm not saying it doesn't matter what caliber or type of round you're shooting. Choosing ammo with a good track record of stopping a violent attacker, that's reliable in your gun and that you can shoot well, makes sense. What I'm saying is that whatever you carry, you should, in a sense, "expect" your ammo to fail. That way, if it does, you can respond as needed, immediately, instead of wondering, "What just happened?" as your attacker closes on you.
I would also think that even if he had that 18-round M&P and got the 12 hits you proposed, he'd
still wish for more ammo.
Or a shotgun.