I know some have had success breeding females this small and hats off to them. Generally speaking 1500 grams is a nice number to start at. People like to push envelopes and I think a lot of people have probably pushed the 1500 gram envelope that seems to be the common number on the site as well as 2 winters old. While yes younger and smaller snakes have been bred successfully I think we have to watch what we say when discussions are in public forums like this. All you need to do is find someone who does not have the proper experience to read their snakes (or thinks they do, but really don't) start searching on the web and see some rediculously light wieght ball python can be bread and they will try it. I know I don't have the experience yet to even think about breeding a female less than 1500 grams, but I did find Jasballs discussion on it facinating.