To what end? Why is this cross being considered? If it's to be done in a controlled fashion with a goal in mind that's one thing; if it's for the "new blood" so many people feel the need to introduce then I wouldn't. The absolute best way to screw up a breeding program is to indescriminately cross strains.
He is trying to correct bad breeding, that the previous owner done. The previous owner of the flock "flock bred" the birds with no selective mating, and they have lost some type and turned lighter color. The person whom i am speaking has a family history of breeding birds going back to his grandparents, and i usually trust his breeding advice. In the case of RIRs i would rather get the advice of a group of long time breeders, for my own advice. I now have no intention of breeding this cross strain into my program.
the birds have potential to be nice birds with some very discriminate breeding, I do not yet have the RIR breeding skills to take on such a task and he might. Thanks for all of your opinions. If he wants to spend years correcting the outcome, then i will let him borrow one of my roos.