Free: Contests & Raffles.
I had a really nice Lefever 12 double choked cyl/full, and for open country covey birds (huns, chukars and the occasional wild rooster), I did most of my killing with the full choke left barrel at 40-60yds. The cylinder barrel proved to be almost useless unless the birds were at my feet. So, unless you're hunting grouse, lm/f or ic/m is a great all around combo, and if I had to pick just one, it would be ic/f. I had my Masquelier 16 hammer gun outfitted with a permanent Briley ic choke sleeve in the right, and sk, mod, and full tubes for the left, so I can use it for skeet and for upland birds. I like skeet in the left barrel for skeet shooting, since the second shot on doubles is about 15 yds.