You're much less likely to be bothered much by recoil when swinging a shotgun than you would be by sitting at a bench, taking deliberate aim and getting belted by a rifle with an equal amount of recoil. I would recommend that you buy a PAST recoil pad to strap on to your shoulder. I've got one. It is very unobtrusive and really helps me deal with 12 guage shotgun, as well as .30-06 class rifle shooting.

Pay close attention to your hearing protection, too. Muzzle blast makes me flinch much more than recoil does.[:@]