correct you were. ser# fw m58xxx but now im reading about loads in this forum are they for the older shotguns? all i plan to shoot is 1 1/8 oz. #7s sporting clay or dove hunting, but if i need to go to 1oz.or 7/8oz. i sure will. this things tight and keeping it that way is a priority. i know its a marlin reproduction but this one could end up being the pride of the fleet so to speak. thanks rs