By LH I mean longhorn. That's what we started with. This was 2014 when black hided cows were going for $3+/lb at the sale barn. So we went less expensive to try and get our feet wet. I didn't lose money on them b/c I sold them all as freezer beef, BUT! I could have made a lot more money starting in Angus. What I found is that the local gene pool was really shallow, and to drive and buy new genetics but the price of cattle more than the $3/lb to stay local and buy Angus. You can get semen for AI, but most of the AI guys don't stock LH, so I would have had to buy a tank and ship myself. Again, added expense. Then to sell them, the breeder market is pretty saturated, I don't have roper contacts, and the sale barn is not an option. I could go on, but this should give an idea on my thought process.
Yes, black bull is anything angus genetics.
I went black Angus b/c they sell well at my local sale barn. I can get the AI to stick them with a variety of genetics, and I can put hereford in there to get baldies, or Simmental to get Simiangus. Also, within 20 minutes of the house I've got a dozen breeders. Finally, doing freezer beef, they grow well, quickly, and sell easy.
Hope this stuff helps.