I used to and still mostly shoot free handed without a rest. But you could lean against a tree and if the squirrel is still and you can squeeze the trigger, you could easily take them under 40 yards. You need to practice some and learn how much front bead at different distances. Have it set to shoot even with top of rear site at 20 yards average. that would get you at say 15-25 or 30 yards. Then at 40 elevate the front sight slightly higher than top of rear sights. Up close, say 10 feet at a snakes head, you hold the front sight higher, even more than a 40 yard sight. Because the barrel is under the sight and is climbing so to speak. With practice at different distances, you can do it without thinking much. A 5.5 inch bull barrel or one of the Browning slab side barrels, they are highly accurate too. I like the trigger on Browning 22 pistols. They are short pull and crisp. If you shoot the Brownings or Ruger auto 22 pistols enough you would be confident enough to use them for self defense if the need ever arose. I did not start shooting handguns regularly till I was about 22 or 23 when I bought my first H& R 22 revolverI bought my first Browning pistol, a Buckmark when I was in my middle 30s. They are fun. I have a new in box Ruger bull barrel that I have owned several years that I am going to shoot one day that I bought for an investment.I have a S&W 22 auto , I love S&W revolvers and some semi autos but I have never taken to it like the Brownings or Ruger. But is accurate too.