I personally dont pay much attention to En$ for 2 reasons.
1. Our commercial cows that are good doing cattle are TERRIBLE milkers. They look great in the pasture until you see their poor little calf. You cant have your cake and eat it too. Either the calf is getting nutrition or the cow is. You have to "help" your cows just enough to keep them with enough body condition to breed back and milk, but no more than that.
2. I dont have many registered cows but I have a mother/daughter the mother is a plus 15 for EN and is a VERY hard doing cow so hard doing she is not on time with breeding back, which is why now gone. Her daughter is +9 and is pretty easy keeping, but she also raises a good calf (There are pictures of both posted in earlier threads.) She has avg. 660# of WW on her last 4 calves.
I dont believe in no input cattle, but there is a fine line between just enough and too much feed. Our mature cows only get supplement for about 30 days all year. Our 1st calf heifers get alittle more help than that to help them breed back. The rest of the year they are on winter pasture (Oats, Rye grass) or alittle summer pasture (Brown Top millet and Crab grass) with the permanent pasture a mix of Argentine and Pensacola Bahia grass.
About using Gridmaker, I personally think that he may not be pure Angus from his picture
Not to stir the pot too much but look at him (kinda Apple butted, alittle too brown, Great Ribeye and no marbling) kinda sounds like a Limmy cross to me. Maybe why he doesn't milk either.
Remember EPDs are a tool I'm sure everyone has seen a 90# YW Angus bull they wouldn't let breed their worst cows!