buzzsaw066

I recently purchased a new in the box Franchi 612 VS with the Variopress System. Read the manual, went out to try it out, and it won't eject any 2-3/4 in shell I put in it. It has no problem with 3", but kicks like a mule. The manual says it adjust for all type of rounds. Is there something I'm doing wrong? or needed to adjust. I've read other threads here about people shooting 2-3/4 shells with no problems. I see nothing in the manual. I love the gun, it's nice and light. Thanks