I've hunted since I was 5. Had a lifetime hunting and fishing license since 7. Got all the training I need. It's funny going hunting with cop friends of mine and I'll have limit by 9am and they are still out in the field at noon while I'm in truck sucking cold ones. They are good at shooting mocking birds tho LOL

I am also fairly good at three gun even tho I just started a couple years ago. Anyway I still would not go into a combat situation without a 180 rd loadout.
Home defense is worse than people can imagine because of cover everywhere,darkness, little pistols which barley shoot though walls etc. Basically you're screwed if you don't have lots of firepower and guys are determined. Throwing down suppressive fire is the only way to survive and that requires lots of ammo.
It's really nit~picky: But around here you're liable if/when the rounds you fired go through walls. Not a big deal if you live where there's plenty of space. A *really* big deal in a populated area, and there's neighbors on the other side of the
(wall...yard...).
Not a popular choice among enthuisiasts... but if you Haz To: A large caliber revolver loaded with Frangibles
(**for those who don't know: they're designed to break apart on impact and not over~penetrate).
Or (far better) a Shotgun loaded with
(BB to #2~ish) birdshot. You don't have to be as accurate, and Pump actions have the added deterrent value that you *WILL* get a reaction when the other guy hears you work the slide. And now you can tell a Jury that you used 'Birdshot' because you didn't really want to kill anyone. As opposed to Buckshot, which has an effect much like a .30 cal pistol round, except there's more than 1 of them per trigger pull.
Around here, You're also vulnerable after the fact if a Prosecutor makes a case that your reaction was excessive
(i.e. spraying bullets everywhere). And your assailant had better pass away *inside* your house, or they could
(and have successfully) made a case that it wasn't necessary for you to shoot them because they were trying to leave. ...and that's manslaughter for YOU instead of B&E for him. And if you did, in fact, shoot the guy in the back: Call a lawyer now, because you will be sitting in front of a Grand Jury.