Well it just depends on their breeding, sometimes with the outcross you will have a very high variation of calves. I would like to know their actual breeding, its easy just too eye ball it but you probly wont get the results that you want. I would say that you need breed them to something that is similar in breeding but still has been proven to increase frame size either through the bull or other like brothers. Find out what their frame score is and try different bulls that way you have an idea of what works on your herd. Then frame score all the calves that you get from this crop to determine which bull did the best for you. I am more partial to the Trump and Rodeo Drive bulls, but like i say it might just be a total out cross for you. Plus you might want to find out if anyone has any cattle bred like yours to see what they are doing to increase mass. Or i would talk to K-Kim talk about some good functional cattle with some mass and depth, but im still partial to the Trump sons.