Well, time to chime-in with a few photos myself. Not sure if I've shared these on CGN or not...? Anyhow, I did get my first opportunity to shoot gophers out west last summer, probably the most fun I've had in a LOOONG time.

Mostly HMR action, but sometimes the shotgun was employed on close ones...or gophers in tall hay when I went for a stroll. The ones in the hay wouldn't move until I was about 10' from them and they'd start to run. Shooting them "on the wing" was quite an experience.
Within a few hours of landing in Calgary. The HMR undoes them pretty good. Reason I just bought one.
Taking 2 off a hump with bird shot. All rifle shooting was done prone, so if the gopher mound was a little in elevation..or on a hump in the field~it made that an unsafe shot. So, out came the 12ga. You might not be surprised to hear that a 12ga is an effective gopher killer. Even with an open choke.
Scored a double with the HMR at 95 yards. The one closest to the rifle was the intended target. The one in the foreground materialized just past it...moving towards #1. A moment later, it was behind #1 and I let the 17gr. V-Max go. #1 dropped, #2 didn't look so good either.
My buddy out there told me numbers were very low compared to previous years, but they seemed awfully prolific to this eastern groundhog hunter. I pull the trigger here maybe once an hour while groundhog hunting on average. Gopher shooting? There were times I wished I had an assistant loading mags.