Thanks for the feedback...
Most shots would be most likely around 150 yards, some out to 400 or so. This will be with a .204 Ruger.
I might save some pelts, but really just thinning them out for the farmers whose land we hunt.
Well your very lucky,
Here is what I would do having the chance you got

Its great to pop em at 400 yds, but you can have even more fun.
I would test the old girl on some cardboard cut outs of coyotes @ long medium and close range.
Then go out and get a Reed call, and a Diaphragm call .
Farmers toss some dead animals in a corner of or into a woodlot, if so you can setup on that downwind.They come to these sites running at each other for a few minutes then head off alone for a bit.
If no animals , setup downwind of a woodlot anyway where you can see tracks,(binos can do the walking for you here) then call em to you for a through the ear broadside shot , no hole in the skin.
If you get a couple heading into the field get one standing, and don't rush the second, no broadside at 40k, but if you can make heck why not, I would hold for the back of the head shot when he slows heading directly away.
Cheers.