I would use a Black Angus bull, knock the Horns off and color them black, here in the mid-south.
In the deep south a Black Brangus would be the ticket.
If I lived in open country with a thousands of ac. and I had a 1000 LH's cows ,I would use a Black ( angus,bal.,brangus) Bull for 2 gen. and then a Hereford. I think I could live with 3/4BA X 1/4 LH cows breed to a Hereford bull.....In 20 years, you would have most of the Full LH"S died off, and the 1/2 breeds cull hard. You could do the same thing with Holstiens, A 3/4 Shorthorn and 1/4 hol. grass fed 3 years and grained finished makes some good eating...
My point is start with the best cattle that you can buy, NOT the most $, The best...I reather have 5 good cows than 20 bad ones...
I think the LH's thing went 3 or 4 ways....
1. HORNS
2. Heifer Bulls (30-40 years ago)
3. We love them ( not as beef cattle but like Buffalo )
4. Ruged , tough cows that has a place where other cows would died, (now we got Brimmers) who needs them?