I have a 20 gauge single shot shotgun that is chambered in 2 3/4”. I was recently given a boat load of 20 gauge 2 7/8” shells. I have searched the web and can’t find anything telling me yes or no in regards to shooting these shells out of my gun. I called a gun store I shop at and I was told “you should be ok”. Should be……. Not sure I want to drop the hammer on a SHOULD BE. The gun will accept the bigger shell and the breach closes fine. Any suggestions from my INGO family ?