I-67 on heifers

I just found this bull and really like how he is built. My question is they talk about calving ease with him and I was wondering if he would be good on a heat wave heifer? Has anyone used him or used this combination?

I used him on 10 heifers this spring

I used him on a few heifers this spring and one is a heatwave. But I'm not much help because I have no calves on the ground yet. But I won't be getting to far during calving season

We had two I67 steers born this year. Used him on a Boardwalk second calver and had to have  vet crank calf out.  Will be a nice show steer though.    The other was out of a ten year old Maine cow born unassisted but was huge 140 lbs (she had to really work to get the calf out).  For our genetics they seem to come big. :-\