I thought about .223, but figured it was a bit much for groundhogs, possums and such. This may sound like heresy, but I intend on leaving the coyotes alone since they fill the predator niche the foxes had (There are still foxes around, but they are few and far between.)

That being said, if I found a good .223 in good condition...and there's a gun show here next weekend...and it's just after payday...