The 9mm Carbine is the only gun of the three that I would use for home defense. Uses the same ammo as a 9mm pistol but hits much harder. It's also a survivalist rifle by design so it fits in a backpack, and I will be gong camping in northern MI soon and I have a magazine with 165 grain full metal jacket ammo specifically for that reason. Northern MI is bear country, also coyote, wolf, and cougar country. Lynx, bobcats, and foxes that live up that way can be dispatched with "normal" ammo. Truthfully, the 10mm rifle and pistol I'm looking at are far better solutions, but until I have them I have to use the best for the task out of what I currently have and that's the 9mm.
My .22wmr rifle would not ever be my first choice for home defense. Not that the .22 magnum round isn't up to the task, but there'bragginh abs a significant risk of over penetration from that round, particularly with the 50 grain and 40 grain full metal jacket rounds I have for it. Otherwise, its a great hunting rifle for small game (particularly pheasant, duck, goose, and wild turkey) and also for pest control (remember, I live out in the sticks, opossum, racoon, and other varmint are a constant nuisance).
Deer season is almost over and my boys up north that hunt have already done it, so I gotta wait until September or October to get the squad together and head up to mid-Michigan. If for some reason I haven't picked up an AR10 (.308 Winchester) or .338 Lapua bolt action rifle by the time the next season rolls around, my AR15 can do the job as long as I get the right shot and I'm not too far away. One of my boys up in Midland has been talking about going out for Russian Boar lately, and because it's an invasive species you can hunt that year-round. A heavier .223 round in the AR will handle it, but not as well as a .308/7.62x51mm NATO round from an AR10 would.
As for having a lot of magazines: I really doubt you've ever been to a gun range. It's better to have multiple magazines than to waste time stopping to reload every time you run through a magazine. Drop a mag, load a full mag, keep shooting. Reload them when you get home. For practice, I can run through 200 rounds from each gun in a single visit without even thinking.
No single rifle is the right one for every task. Same for handguns. Same for ammo. There is no one-size-fits-all solution for guns., Shit doesn't exist. I selected each of my guns after careful consideration. Even the joints I'm looking at buying in the future had a lot of thought put into them. Each handgun can also use the magazines from the rifles of the same caliber, which saves money. Each rifle has a specific duty.
