I have heard disasters out of i-80 a few times. Got a friend who bred 30 heifers to jesse james biggest calf was 74 pounds (he weighs then all with a hanging scale). A lot of people swear by angus for calving ease. All my neighbors have angus cows and they will tell you the same thing i am going to tell you. I breed all my heifers to Ali until i bought a bull 2 years ago from Bill Elliott. He was an Ali son. Biggest calf i had last year was 75 pounds with a brick tied to it i mean they were small, and out of clubby heifers and some simmy heifers. The biggest problem clubby heifers have along with calving ease clubby bred bulls are their owners!! Why I say that is, i know a hand full of people in the midwest who turn their cows out on some corn or poor the grain to them to they calve to keep them looking good. Well whenever you keep your cows hog fat or keep graining them year around, HELLO your going to have a huge calf out of a texas longhorn bull! We grain our heifers up until Late may early june. We get them to 1100 pounds breed them, turn them out on pasture and make them cows!!!! Quit showing your heifers until august september and october and i bet your calving problems are cut 75%. All my heifers usually milk too compared to the old heifers i used to take to my state fair in august. A Vet i clip for feed her heifer hard to august for their fair, had her bred to Northern Improvement (heifer was a paddy x meyer) and the rip had a 110 pound bull calf out of northern improvement (one of the most proven angus calving ease sires ever). When I used to breed clubby heifers angus, if i got a steer he was usually freezer beef and if i got a heifer thats all she was was a heifer. once in a while I would get a good heifer. But an angus bull x clubby cow usually cant win a lot because they show in the crossbreds against power houses (once in awhile you strike it rich). By breeding my heifers to Ali and now my bull from elliott, the cheapest i sold a calf for last year out of the herd bull was $1250 and they went up to $1750 out of heifers. When i would breed them to angus, i was getting $600-$800. This is truly what i have experienced. And all my Ali's are coming the size of angus calves with more style hair and thicker. I think Jesse James does this also. My point in all this is, with the proper management, not graining your cows year around, and just feeding them grass hay in the winter and stop graining them mid-summer, if you breed to Ali, Jesse James, or even I-80, I have experience showing you will get a calf about the same birthweight and the calf will be worth ATLEAST $500 more. and I have yet to pull a calf out of a heifer since I stopped feeding them in June 5 years ago. It all boils down to mangement. JMHO and Experience