Thanks for the input, Bruce. I've raised Cornish X from the hatchery in the past, but the ones I've had were not very healthy or active. Lots of leg problems, even with the very small chicks. Some dropping dead for no apparent reason. Lazy things that just laid around waiting to get fed again. It was rather discouraging. We didn't let ours get much past 8 weeks.got to tell bobbyj shawn likes his but then again he has a market for his. from a personal stand point i like the cornish x a lot. i free range mine. they are active and healthy.
when i do the x's .they are all uniform in weight. i raise last batch to 13 weeks and wights went from 8 1/2 to 11.4 dressed out for the oven. also got 5 lbs. of organ meat.
the rangers i raised to 15 weeks.and weights were every where. the average was 3.75 dressed for the oven
the rangers are very rough with the pullets.and some less dominant cockerals .
the cornish x very friendly no fighting at all.
i would not recommend raising cornish x for 13 weeks. the conversion from feed to meat is not worth it. they stop really putting on weight after 11 weeks.
as far as uniformity my rangers had bigger thighs and legs . breast meat only fair compared to the cornish x
just my take on it