Hi Bigyin, I used to have an Anshutz .22 when I was younger  (REAL RIFLE NOT AIR-RIFLE) but bought a German brand,can't remember the name, .22 air-rifle from the gun shop just over the bridge in Amposta. The difference in stopping power between it and a standard .77 air-rifle is very noticable especially when using pointed ammo- should put down the bunnies quite effectively with a scope mounted and properly zeroed.