When I first read this Alias jumped into my mind but after looking, the BWs do not scream calving ease. However even though the wights may average over 90 I have never touched one, they came easy. Would really be careful using him, you do not want to use on a cow with any clubby in her, or one that is not structurally sound.
Now if you want true calving ease, I have used a PB Charolais bull with great success's. All 3 heifers I have kept, and I rarely keep heifers from calving ease sires. One of these have already calved and the other is due the 30th. Great looking calves.