OK gcreekrch here is a semi educated calculation for you. Average birth date:May 15, average birth weight:85 pounds, average weaning weight:500 pounds, weaning date:Oct. 28.
That gives them a WDA of just over 3 pounds and an ADG of just over 2.5 pounds. I tried to weigh my second bunch but my scale took a crap for some reason. I tried it again today and it works just fine. Go figure. :?