I have a Gamo Whisper, this model to be exact,
https://www.cabelas.com/shop/en/gamo-whisper-fusion-mach-1-air-rifle-with-scope?ds_e=GOOGLE&ds_c=Nb%7CGeneric%7CCatchAll%7CDSA&gclid=CjwKCAjwmK6IBhBqEiwAocMc8o0Sa9V3Kv2f3KP_Hg-gUfiiGUMe32CFnXxjXho2_JT3BkGy94suUxoC2YkQAvD_BwE&gclsrc=aw.ds
I wanted it for squirrel patrol around the house. It's okay....not great, but okay, especially when trying to shoot 30 yds +/- It does do better at shorter distances. I will say that it kills what it hits. I found the scope that comes with it is junk, I currently shoot it with fire sights. I also found the type of pellet that you shoot will make a difference. I bought this variety pack to test with,
https://www.cabelas.com/shop/en/gamo-performance-pellets-combo-pack
I found the rocket to shoot best out of mine. As Tod mentioned, it's not a rifle per say, and does take a little getting use to. I simply do body shots and not head shots. It gets the job done for me during the summer when vacationers and seasonal people are here on the lake, but for the other 3 seasons, I use my 10/22 with sub sonic rounds.
I hope this helps.