the large wheatens and blue wheatens were originally bred up from bantams by Wayne Meredith
The wheaten cockerel that I have was sired by a cock I bought from Wayne. He was huge and the son looks big to me and weighs 5 pounds. Now I checked the Standard and see that cockerels should be 5 1/2 pounds and cocks 6 1/2 pounds, but I don\'t think most Ameraucana LF are as big as they should be (if you use a scale).
I have crossed LF and bantams before, but recommend it as an all most last resort (just one guy’s opinion). The dwarf/bantam gene can haunt you for generations. I don\'t have proof of it but wonder if there is more than one gene involved. It is not worth doing if after crossing LF and bantam you have to make an outcross to bring back size.
One cross that I\'ve considered is wheaten to blue LF to help with both the size and type of wheatens/blue wheatens. Mike originally made that cross in bantams to develop blue wheaten. The LF black and blues have some of the best type of all Ameraucana LF and I think a really big blue with great type and lacing would be something to work with.
I have crossed LF buff and wheaten, but after seeing the F1 generation think it may be difficult breed out the additional genes brought in by the buffs. I think this cross would be better used to improve buffs since they are already wheaten (recessive, but some may dominate - at least in LF buff) at the E-locus.