"Anybody have an idea for a quiet, powerful, & reasonably priced air pistol? Pumps need not apply...my neighbor has suffered a brain injury & a shoulder injury."
I know you said no pumps but my Benjamin .177cal took MANY Starlings and other pests. It was accurate and powerful enough. Use flat head pellets and forget the pointed or hollow point nonsense. In .177cal, flat heads work best on all game I have ever shot. In .22cal, I don't know since I have never owned one.
If you want a pistol that is not a pump, there are two main groups that you should look into. Foget CO2 since I have yet to see one that was as powerful as the Benjamin. You need to look into single stroke pnuematics and spring air pistols. A good single stroke is the Beeman P-1 but it is pricy. A good spring air would be one of the RWS pistols. Try to find a recoiless and you will be much happier. The normal recoil of a spring piston will ruin a pistol's accuracy.
I also had an RWS 45 that I wish I had never sold. It was powerful and accurate but at close range it was too powerful. When I would shoot a Starling in the body with a pointed pellet with the RWS, it would fly off like it hadn't been hit. When I would take the same shot with the Benjamin and flat nosed pellets, it would more often put them down than not. This is specific to the .177cal I think. I think a .22 would be better out of a high powered rifle than a .177. I think a .22 at 600FPS is more deadly than a .177 at 900FPS. Personally, I think you want the pellet to be traveling between 400-600 FPS when it hits the target for maximun shock.
I say this and I know it is true from what I have seen over many years of killing many pests with pellets but I still prefer 9mm over .45acp. Why is that?