^ All points I've considered as well when reaching my decision. I always assumed pump-action shotguns would be "ban proof" as well.
Not models like the Mossberg persuader, 590A1, Shockwave, etc, etc. Too many brands and models to list really. I remember the tube limit for the last proposed ban was like 5+1. I had a Persuader that held 7+1.
If you are in a shootout at handgun distance, expect misses.
I'd rather have the extra ammo for when that huge adrenaline dump settles down and you can actually work your way onto target.
Misses in such situations are unacceptable. If you can't hit the people shooting at you, don't pull the trigger. You could hit somebody else, and that comes with a crap-ton of legal, moral, and mental anguish. If someone's in a shootout, they don't have the luxury of waiting for an adrenaline dump to settle down. They'll be getting shot at. By the time anything settles down biologically, that person might (and probably would) be shot or dead already.
The goal should be to learn and train to fire accurately while under physical and mental pressure, not to still have enough ammo left after sending bullets where they shouldn't go, or waiting too long to defend one's self. If someone can't hit "center mass" at handgun distances, then they should be escaping, not risking the lives and safety of other innocent people.
Please understand that my reply to your comment was in no way personal. I'm merely discussing its subject matter.
I'm not going to go into how all this is extremely unrealistic, but if everybody plugged everyone they ever shot at the murder rate everywhere would skyrocket and wars would be won in short order.
It takes YEARS of training to get that good in combat situations. Delta Force literally shoots more per year than the ENTIRE Marine Corps and that is like 250 dudes. So just imagine how much you'd have to shoot as an individual to be part of a group that outshoots an ENTIRE BRANCH of the US Military.
You basically just reiterated the rules of firearm safety, but I think most people would agree that those rules are much harder to follow in combat situations.
Especially when you aren't given the upper hand in a fight. Like if somebody walks behind you and starts blasting and you don't expect it.
I'm not as proficient as someone like Raging Dragon would have been being with the 75th but I have been doing the thing for the US Army for eight years and have had plenty of CQM training. Where we train in full kit with sprints and pushups to get our heartrate up to simulate what actually happens in real combat.
I'm not saying its not a bad rule to follow, everyone SHOULD obey those rules to the best of their ability. But if you don't think adrenaline is going to effect you, or your rapidly pounding heart, or your breathing when a badguy is unloading on you then stop what you are doing now, go down to Fort Bragg, and apply for Delta.
This isn't even bringing up the entire mental aspect of it. If you are a normal person your body will rebel against you when you try to take a life. Most of brm in basic is designed for future soldiers to see the enemy as nothing more than targets and not people. If you haven't had that conditioning, which takes months to settle in (and for lots of joes it never does, google 10% of soldiers fired their weapons in WWII) then you most likely will struggle when the moment of truth comes in.
There are reasons that soldiers and police carry semi/automatic weapons with multiple magazines and not revolvers and bolt action rifles. It's because they know they aren't going to hit everything they shoot at. Could range from everything from suppression, to probing by fire, to the mad minute to establish fire superiority in which rounds are flying all over the place to keep the enemies head down so you can move into the positions you need to break contact, flank, or assault through.
By all means, you do you. I will take more ammo.