This is my first shotgun. I picked it up from a guy for what I think is a fair price (140.00). The gun is excellent shape as it is still in the factory box and wrapped in the original anti-rust paper. My questions are: Does anyone have any experience with this shotgun. The barrel is a 30" vented rib with a full choke and is stamped 3". Can I shoot 2-3/4 inch shells in it? Thanks for any info you have.