Crow hunting is legal on Sundays in Pa as long as you have the licences and what not.
As for woodchuck, or as alot of us call them, groundhogs, you will have best luck in or close to a vast open area preferably by a bean field. I hunt g-hogs alot here in Pa with a 17hmr, 223, and 25-06 so as you can see by my arsenal shots range from 5 yards to beyond several hundred. Again, this depends on where you hunt. Local farmers around here are generally nice and if you get chatting with them, they will let you wipe out the hogs in thier fields. Make sure you mention safety though as some area's in Pa are being populated unlike how it was back in the day. I like to walk around until I see one on my property but when hunting other land, I will sometimes setup on a place that I know has alot of hogs. At my sister's, I can lay prone on her back porch plinking groundhogs all day out to 250y.
To show you the variety you will get....I have already killed hogs in the middle of the woods. You won't have the best of luck here though and like I said earlier, the bean fields are the best. Many times hogs will live in the 'fenceline' or hedgerow of a field and then go into the actual field to eat and hang out. This is when you will get the shot. I would also recommend a bi-pod. If you dont have one, you can go here to make a set of shooting sticks or as it is called on the site, "bi-fur-pod".....
www.varmintal.com OR
www.varmintal.net Under 'page index', click on 'Make a bifurpod'
These are great for when you are out in the field and are pretty simple to make.
By the way, the 22-250 will work excellent for you but if you want them to really fly, the 25-06 is nice /ubbthreads/images/graemlins/smile.gif
Edit: When I mentioned crows, it most likely made no sense to anybody who read it. I meant to add that this is one of the animals which is indeed legal to hunt on Sundays.