I've had some experience with large varmints myself. A hundred or two of these for the last 10+ years has helped me formulate my opinions. Rifle pictured is a Beeman R-9 with Nikon EFR 3-9x40. Been using it for 5-6 years now.
[Linked Image from i.imgur.com]

A true sportsman counts his achievements in proportion to the effort involved and fairness of the sport. - S. Pope