My two cents, I agree 100% with "the Vet". Last year I rented a bull, 4 calves, 2 we had to pull, 1 still born during the night (should have watch closer, live and learn leason) and 1 unassisted. BW's were between 89 and 98 pounds on the 4. Bought a bull with good BW EPD's last year and this year 7 calves between 92 lbs. and 98 lbs. all unassisted about 20 minutes to deliver from the time the water bag showed and after twenty minutes on the ground couldn't get catch the calf very easily, learned after the first two to weigh them when they hit the ground. Called the guy I rented the first bull from, he had about 30 cows he used the bull on, the bull is now on the meat shelf. Second bull has better BW's stronger calves and better growth rates so far. Yea I love this bull.
Alan