It depends on what you consider good. He graded a low choice which is good and a YG 3 is also good. From what I know that is the base of grid pricing. Anything less or higher receives a discount or a bonus. When cattle are bought on the grid they receive discounts for being dairy type, being too fat, having to heavy of a carcass weight, being too old, for meat quality problems among other things. If you want to see an example pricing grid go to this website
http://www.meatscience.org/page.aspx?id=5071 and click on the current pricing sheet. REA, FT, and KPH all contribute to the yield grade. The quality grade is just dependent on marbling. I have been told Brahma influenced cattle don't grade well so it's impressive if that is true. REA is dependent on muscling. I have seen cattle anywhere from an 8 inch to over a 22 inch ribeye. 13 is probably close to the average. Desirable fat thickness is between .4 and .6. The base of KPH is 3.5 with less being better. Hopefully that makes some sense to you. He sounds like the profitable kind of steer.
