I have owned 6 or 7 ball python's in my time with one reaching 4'6" as my largest. Not all of mysnakes were fully grown but I was happy with that size. I have heard of many reaching 5 feet and very rarely some reaching 6ft?
I currently have 2 (normal) yearly females Is there anything I could do to promote the largest possible growth while their young? Anything? i'm currently feeding them small rats every 4-5days and I have them in a 55gallon.
Any suggestions?

~Steve