Typically you would want a calving ease bull or one from a breed not known for throwing big calves on a heifer. They aren't done growing yet and you really want to make that first baby as easy as possible on them.
Holsteins are rather large and you could end up with a dead calf...and a dead heifer.
My Great-Uncle was a rancher. One year he bred a large bull to angus heifers. He had to pull several calves and never did that cross with a heifer again. The risk of loosing a cow while he was asleep was too great.
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