They look like some nice cattle. I'm curious what brought you to Ultrablack? Do you know what it costs to register an Ultrablack?
I don't really understand the reason for Ultrablack. I'm guessing it is primarily to draw in some registration fees to the Brangus Association from the large number of owners of Registered Angus cattle. It doesn't seem to me that these animals would provide any benefit beyond that which you could already get from Brangus.
By my calculations these cattle are predominantly Angus, so unless you are breeding them to non-Angus cattle, you would not actually receive much benefit from hybrid vigor. A Brangus bull is a breed that contains 37.5% Brahman blood and 62.5% Angus blood. An Ultrablack, I read, would be between 12.5% to 87.5% Brangus and the remaining blood should come from Registered Black Angus. Doing the math, it works out to an animal that would be as much as 95.3% Angus and no less than 67.2% Angus. If you're looking for hybrid vigor when breeding to the average black cow with Angus already in her heritage, wouldn't you be better to just stick with Brangus, or better yet some breed that isn't already more than half Angus blood? If you're breeding cows with little Angus blood, Ultrablack could give you that vigor, but so would a straight Angus bull.
Please don't take these comments as criticism. Your cattle look good.