I think the results are the same, but even if they are lower with synched heats, I can get a more cows in heat and more ET calves by synching the recips.
I am pretty sure your concerns are justified. I think cold weather means more feed and less excercise. I know I always get along bettter when the grass gets green.
He is a good looking bull. I never worry that much about bone as long as they are adequate. In fact I would rather be moderate than heavy, as I am concerned about birth weight, etc.