Good for you, I shoot a 270 out of 300........, consistently........ I don't need a hand cannon.
Shot placement is certainly a big part of it, but if your goal is to make someone stop doing what they are doing, the only way to effectively do that is by inflicting pain which is what a "hand cannon" does. It was for good reason that the 38 got the nickname the widow maker in WWI. Not because it made the guy getting shot stop doing what he was doing but because he could be shot three times and still make a widow out of the wife of the guy shooting him. At the end of the day there are many good reasons for someone to choose the weapon they choose. It's a personal preference. But it is important to mate up their choice with the best ammo they can which is what the OP is trying to do.
Let me put it this way, if my choice was a 380 with a good personal defense round or a 9 mm with ball ammo, I'd take the 380 with the personal defense ammo.
I am a NRA Firearms Instructor and a Range Officer. I see all kinds of shooters.
Very few people can hit anything with a pistol while under stress. Even the LEOs that train.
It takes a lot of training to be effective with a pistol. That is why it is best to have the most powerful weapon you can carry. For some, like my wife, it may only be a Sig P380.
I'm an RSO at my club. Probably a third of the members are.
When my wife travels by herself she takes her P238 and her Kimber Ultra Carry. I'm always ragging on her to practice more. Then she reminds me that she has two male German Shepards with her and she will have plenty of time to take aim. The way she sees it she only needs a gun to protect the dogs. I don't think she is wrong.
I totally agree with your point about shooting paper versus the real thing. I was taking a HUET training class which is a water survival class and we were simulating egressing a helicopter which was turned upside down and submerged. It's all done in a pool with a crane. Anyway the last ride is to follow someone out the window. So here I am sitting upside down, strapped into my seat, submerged underwater with a fairly large dude between me and the window. My plan was to just sit there all calm and relaxed until he got out. I was sitting there like 30 seconds before I even looked over. Right before I looked over I remember thinking that I could sit here like this for another two minutes. Anyway when I looked over I expected him to be gone and the window open. What I saw was he was still sitting there struggling to unbuckle his harness. My air was gone in 5 seconds. We both made it out, but I realized that if I ever went down in a helicopter crash in the GoM I would probably die. Training is not the real thing. That's probably why LEO and military train so damn much.
Like you I am also a RSO and also a firearms instructor.
The range where I work is used by the police and sheriff's department.
I am not impressed with the level of firearms training the LEOs get. Many of them only shoot a gun a couple of times a year for qualification. Some of the departments try to require the qualification under stress but others don't.
The SWAT members train a lot but the average patrol officer not so much so.
I don't see the average civilian pistol shooter having much skill. Certainly standing and shooting at a target 15 yrds away with no stress isn't going to do much to hone skills you need in a real gun fight.
I probably shoot more than 98% of the gun owners in the US and I don't have confidence that I could effectively use a pistol if accosted by a crook.
At the range where I shoot the guy that runs it is a very accomplished marksman. He has won many many shooting competitions including Camp Perry. He was the Florida pistol champion for several years. He is a former Marine that was the NCOIC of the Marine competition shooting team. He has trained FBI agents and many LEOs. He knows how to shoot.
After serving in the Marines for awhile he went to work as a policeman in Tampa for a couple of years. He talks about one night getting into a shootout with a bad guy. He emptied all the magazines he had with him and so did his partner. Only one round hit the bad guy.
In Vietnam I saw guys get hit on both sides with rifle rounds and still carry on the fight for awhile.
The movies have distorted the reality of firearms.
I am sure you know that the same as I do.