geezerbiker: that is a excellent idea. There was a fella here who asked about using a high powered air rifle in 45 caliber for hog and shortly after he posted that one of the gun magazines ran a article about big bore air rifles and what they were capable of, including hogs. Having one of those silenced is a pretty good idea for backyard pests. I don't know what the range capability is for one of the big bore air rifles but from what I recall, the 45 cal rifle produced ballistics on the low end of the 45 acp.
Shootall: having a suppressor for a 22lr, either rifle or pistol, is a excellent idea. The courtesy you extend to your neighbors by shooting more quietly could easily fill your stewpot during tough times and/or provide for others. And then too, whenever the ammo supply fattens back up you can have a lot of fun with something like that.