Rockchucks in eastern WA aren't as numerous as they were years ago. Most populations of them get cropped heavier than they should be in order to keep the populations up. Besides... on rockchucks, the standard of a good day is a "100 shot day". That didn't mean you shot 100 rockchucks... but that they were thick enough where you fired 100 shots.

I look at 1000 yard rockchuck shooting as nothing similar to varmint hunting. Those aren't hunting or varmint rifles. Most of them also need a benchrest to accompany them.

Also, in the old days crows weren't protected as they were classed as vermin. An agreement with Mexico in the 70's to protect ravens also covered crows under that umbrella as they're in the same bird family. The US then looked at how to "unprotect" crows and decided the best way was to open a season on them. Some states have a 180 day season open for crows.

Used to be a person could use an unplugged shotgun on crows. It's probably still true even here in WA state. Only advantage I found with an unplugged shotgun on crows was it allowed the shooter even more chances to plow shot columns in trees trying to swing on swarming crows.

Prairie dog hunting over in MT isn't that expensive. All a person needs is a bunch of shells, a tent, some camping gear and a cooler for food. It's easy to find a spot to camp close to the dog towns.