Chris Rhines

Hi all, I recently bought a 24" Benelli Vinci, with the intention of using it as my 3-gun shotgun. However, I can't get the thing to cycle reduced recoil slugs. I've tried B&P Target Slugs (1oz. at 1200fps) and Fiocchi Aero slugs (7/8oz. at 1300fps), and neither will cycle the action enough to chamber the next round. Is there anything I can do in order to get this gun to run with low-recoil slugs? Lighter recoil spring, something like that? Thanks!