Just picked up an older Mossberg turkey combo 500, with a 28 inch barrel with 3 choke tubes and a 24 inch "slug", non-rifled, barrel with rifle sights. Prior owner used it solely for turkey, which is my priority, but he also said that in experimenting with the slug barrel, it was not very accurate with older style slugs. Does anyone have any experience slug shooting with this gun as I'm thinking that the 28 inch barrel with the imp cyl choke or an after market rifled choke would be more effective than the shorter smooth bore slug barrel? Also wondering if you can use the newer sabots with a rifled choke? Any comments would be appreciated.