Reference accuracy, google “artillery hold”. Most spring piston guns are far more accurate than the person shooting them, since they need a consistent hold every time, and normally don’t respond well to a firm grip. That said, R9 was my first “real” airgun, and agree with all previous comments. You’ll never go wrong with one in any caliber, I have one in 177, 20, and 25 (hw95), love them all. For your purposes, a 177 is a good start since you’ll be shooting small birds. Use good pellets as well, normally a dome shaped pellet is the most accurate for most guns. Steer clear of super light or hollow point pellets as a general rule.
