I've heard of males going in the 300-400 gram range. 2012 was only my second season so take it for what its worth but seems that a little patience in growing you animals a bit more is safer for them and will overall be more productive in the future. I had a male enchi and super pastel each at 600+ grams last season and neither went. My Hypo mojave and pastel yellowbelly males were each about 850-900 grams and produced their first season. Pastel YB fathered 3 clutches. Good luck