I clip a good many simmys for a family and they had some fat butt calves. The ones they had that were good were reallllll good. That was a handful, the others were average and got a shade "pipe gutted" or tubular. So I feel he is kind of hit and moss alittle too much for me unless your cows are ground sows. I dont know too much about Uno Mas though... Have you checked out Rubys Wide Open? I saw a few calves last fall that were pretty chubby and functional last year.
Thanks for the input...with my small herd, I am willing to pay extra for sexed semen so I can get a few more females in production. Doesn't look like Wide Open has sexed semen available. If there are other suggestions, I am open, would just like it to be sexed heifer semen. Thanks.