Save your 'best bang' ammo for your beer cans - buy quality/accurate ammo even for pests. Step up to an ethical hobby.
Not technically bad advice, but I'd echo what others have said. The situation has to be seen to be believed sometimes. I have to travel from Ontario to shoot them so technically it's a hobby/pastime for me. The ranchers don't view gophers as anything but destructive pests-the only good one is a d_ _ d one. They'll also correct you if you say you're "hunting" gophers. The reply is usually something like; "you don't hunt gophers, you shoot them". I've never asked, but I'd bet a beer can is held in higher regard than a gopher where I shoot.
Point is not lost though.