RE: Remington 1100 Question
Remmington has made a number of model 1100 and you will need to make sure yours can shoot the 3 inch shells. I own the 1100 magnum and can shoot all the 3 inch shells I want to. i also have another barrel so I can shoot 2 3/4 inch shells with out any jam ups.
Iam guessing you can with the 30 inch barrel but while you are getting it cleaned have it checked out to be sure as well as safe when shooting it. Also keep in mind that a while back ( quite a few years ago) Remmington had a recall on some barrels of the model 1100. It was because some had split apart so you would want to make sure yours is made to handle the 3 inch shells. Good Luck with it.