need to be careful, beefmasters have bone, then add the char to the mix, more bone, then add a funnel but to the lot and well you might have lack issues. Both crosses work, but I think staying away from a 3way would be best in this case.
My cow Millie is out of a pure Charolais cow and a registered Angus bull. I've bred her the past 2 years to a registered Beefmaster bull. The calves have been Very nice. No excessive bone and very good gain. The calf is the black heifer in the front
3 way cross maximizes hybred vigor after that the percent goes down.
Lots of data from the major Ag universities on crossbreeding systems to maximize hybred vigor.
With BM you have a standardized composite that will breed true not a crossbred.