I had the worst luck with Ali on heifers that are simm/angus. 4 out of 5 pulled. Also the Ali calves did not look any better than my angus bull breds out of heifers, on cows he throws some pretty good calves. Climax seemed to have the worst disposition at nichols, don't know if I saw him on a bad day or what but he didn't like anyone near the pen he was in. Meyers 734 was not the easist calving himself so I don't think I would want to breed heifers to him. We bred our heifers to Hooks Shear force and Grizzly this year but won't know until first of march how they will turn out. Best luck I have had was just bull bred to EXT angus sons, never pulled a calf out of a heifer until I started AIing. Only reason we really AI heifers is just to sync them and calve them a couple weeks before the cows. Otherwise they would all be bred to my Simm or Angus herd bull.