I agree, I had three full sib bulls, one natural two ETs, they weighed 106, 124 (natural) and 137.
Another flush had two heifers at 96 and 98, a bull calf at 130 by c-section.
The bigger/ or more 'capacity' one of my recips has been, the bigger the calf. If I had my druthers, they'd all go in...