I use a 10/22 that has had a trigger job.  It will put any number of shots under a dime at 30 yards.  It will also hit 16 oz. pop bottles at 100.  I painted it with Bowflage paint and mounted a Leupold 2X-7X Rimfire Special scope on it.  After killing several dozen consecutive squirrels with head shots, I switched to a Ruger 77/22 and hated it.  It was no more accurate and the built-in sling swivels are noisy.  The bolt makes too much noise to allow killing more than one squirrel out of a tree.  This sucks when they're cutting hickory and there is a half dozen up one tree.  Next I went to a Ruger Mark II pistol with the 6 7/8" slab-side bbl and factory scope rings.  It is as accurate as a rifle with a Leupold 2X scope on it, but is just too damned loud.  It also looks like a chromed Harley coming through the woods.  Paint won't stay on the stainless.  After one season of that I am closer to deaf and back to the 10/22 that I love.  BTW, mine functions 95% with RWS Subsonic HP's.  They are very quiet, very accurate, and knock them out of the tree as though they were hit by a baseball bat.  I hate high velocity ammo that leaves them up in the tree quivering to eventually fall.  I have recovered the little RWS pills and they mushroom perfectly like a big bore bullet.  That's what I do.  Good luck!  

I agree with the 10/22. I've got 5 of them or so, and they've always worked well.

Quoted: Bukshot       Where in Mo are ya?

Geez, I didn't notice you're in Missouri.  If you are in the north central part I have my 10/22 (as described above) and a woods full of tree rats (and ticks!) between Macon, Kirksville, and Brookfield.  I am there every weekend if you want to come by and try them out.