we used him on about 15-20 harddrive and sooner daughters.had gestation of about 273 days. nothing over 70lbs. most are about 30 days old-get more impressive as they get older.
we used unstopable last year. about 15 calves. the best one was out of an irishwhiskey daughter. he calved alright. doesn"t add enough power for us. we bred 1 cow to him for the spring of 2013
talk to your vet. you can induce her up to 14days ahead of her calving date. (be sure of your calving date) we usually do it about 7 days proir. takes about 26-to 36 hours for them to calf