My Beretta Extrema 2 is having trouble ejecting 3.5" shells. It cycles and ejects 3" shells fine. What happens is the gun will fire and the spent shell will become lodged between the bolt and the ejection port on the side of the gun. Do any of you have any experience with this? If so, how did you fix it? I have checked the gas ports inside the barrel, whichare clear, and I have also checked the piston, which is also squeaky clean. So I am clueless why this gun chokes on 3.5" shells. Any advice is much appreciated.