I have to agree with Travis on the cleaning. I bought into the, "17's foul after 50 rounds and have to be cleaned religiously," myth when I had my first one. Wasn't a big deal when I was just fur hunting.
When I went out for a ground squirrel hunt that cleaning crap got old in a hurry. Shoot 50, clean. Shoot 50, clean. After the first day I said screw it. If I ruin the barrel I'll put a new one on it. I shot the rest of the weekend with it without cleaning. It shot as well at the end of the shoot as it did going in. It shot as well many years later and after numerous annual ground squirrel shoots with minimal cleaning.
