I hunted with a Stevens single shot with a fixed modified choke for 10 years. I never missed a bird with it and tagged out with in each year too. My grandfather taught me to make the first shot count. He also said if you had him coming in, don't do anything to make him to go the other way. That single shot caused me to either let him get in close, or let him pass if I didn't have a good shot. Hunting with a single shot definitely taught me to become a better hunter.
Good luck with yours next time you hunt.
Jim