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22 hollowpoints don't expand out of handguns so it loses lots of effectiveness, only stingers expand but they're too hot for most pistols and aren't accurate. You might be able to chest shoot a turkey with stingers out of a rifle but a 22 pistol can't punch above it's weight like that. 9mm isn't terribly destructive on small game either, so basically the 22 pistol has no functional advantage over the 9mm for survival hunting with a handgun, it doesn't solve any problem.
22lr isn't terribly useful in a rifle either. It's very quiet, but that doesn't really matter because the weapon isn't concealable. The big issue with discretion isn't noise, it's concealment. Getting seen openly carrying a weapon can be bad news. There are takedown 22 rifles but they're still too bulky for most daypacks, add tons of weight to your system, and they can't be deployed quickly so they're only useful if you're carrying the weapon in it's assembled state. If you can somehow manage to smuggle the weapon into the hunting grounds to begin with, the muzzle blast doesn't matter because the woods act like baffling and make it almost impossible for people in the distance to pinpoint your location or even hear you at all, and you can't operate ATVs in the Eastern forests so they would have to track you down on foot through nasty mountain and swamp terrain, which probably isn't happening. It let's you skip earplugs, but it's not hard to quickly and smoothly put in silicone earplugs with practice, especially if you have both hands free because you aren't carrying a rifle, and there's also electronic muffs.
