I had a diana 350 magnum in 22. Shot 3" groups at 20 yards. I returned it and bought a diana 34 in .177. I had one ten years ago. I killed groundhogs ,skunks and raccoons at 20-30 yards with any rws 8gr. Pellet. All headshots, all 1 shot kills. I pulled off some great long shots on blackbirds including a confirmed 65 yard shot. I highly recommened the 34 in .177.. The .177 is over 900 fps which means there is very little drop from 20-50 yds. Unlike the 700fps slow .22. Also the .177 pellets are half the price and there are a lot more .177 pellets to choose from in canada. Think about it- why are target rifles and most airgun compititions shot with .177 rifles? Get the .177 ,you will hit more and a well placed.177 will kill game just as easy.