The best quail and grouse gun I ever owned was a Ithaca SKB model 200 20 bore with 25" barrels. I had it opened up a bit on the modified barrel and left the IC alone. It was quick pointing and fit me well. I had a few more expensive side by sides like a Merkel 16 and a Model 23 Winchester 12 but none were quite the shooters that little Ithaca-SKB was.
