We have ran Brangus sense back in the 60s. The only time I had any problems calving was when I bought some heifers that were bred to Simental Angus cross bull, big mistake, had to pull all the bull calves out of them.Mostly the F-I-L's cattle which were primarily Hereford for the cow/calf pairs. Wife and I had a few Black Angus, but none of them were Springer Heifers.