Hi,
We raised 50 red broilers last year. We got a straight run. We took most the cocks to the butcher after 10 weeks and they dressed out at 4.5-6 pounds. We took the hens two weeks later and they were 3.5-4.5 pounds. We are ordering more this year, but only getting the cocks. The meat is wonderful - we usually do the bird in a rotisserie and it's better than those you can buy at the store. One bird is 2 meals for my husband and myself, and two carcasses make one pot of stock.
We have looked and looked for an alternative to the cornish cross birds and this is the best we can come up with so far. I refuse to do the cornish cross because of how fragile they are, how dirty they are, they will not forage, and they do not pasture well. I am willing to wait a few extra weeks - not 5-7 weeks like another post - to have a decent sized bird that is in good health and can run around and eat bugs - which makes the meat taste better.
I don't need or want a dressed out 8 pound bird. If I wanted a cornish cross, I could buy it at the grocery store, because that is what is sold for meat birds.