Anyone crossed a Cornish Roo over an Australorp hen?

[Australorpus]

Wondering if anyone has done this and if so, what the resulting bird was like for meat? How long it grew out, etc? Thanks in advance.

 

[Molpet]

Are you asking about standard Cornish, bantam Cornish, or Cornish Cross sold as broilers?
My standard Cornish could breed on flat ground. Some male show quality Cornish breeders have the same problems as Cornish Cross with breasts too large to breed.
I kept a CX pullet and bred her with a random FB mixed rooster. I used her cockerels to breed hatchery br, bjg, and bo. Offspring cockerels 16 wks dressed 5 to 7 lbs