I think you got what I was trying to say now. I have production Reds from McMurray. If they have any actual RIR in them at all then part of them had to have come from the originals somewhere down the line haha. I'm extremely happy with mine so far. I have a timeline thread of my flocks progress with tons of pictures and for the most part they look pretty darn good. A couple of the girls are much lighter and look more like New Hampshires but the many are actually quite dark compared to other Production Reds I've seen. They are smaller compared to my Deleware pullets at 17 weeks and actually vary in size quite a bit. The smallest two are quite a bit smaller then the rest and actually look the most mature which is curious. The production red cockerel is larger then the GLW and Deleware cockerels though. He is huge. No eggs yet but expecting soon.
If you cross a RIR male with Delaware females the female chicks will look like the RIR father and the males with look like the Del mothers. I did this a few years ago.