Although I do use 1500 grams as a minimum I do believe there are exceptions. I like to look at the age and girth of the snake. I have had a real long snake that was 1500 and 3 years old but still way to skinny and also I have seen a 4 year old snake that never got very long/big at al, ate welll and was a stubby one but seemed healthy enough to breed at 1300.

To me 1500 is a general weight but there are other factors that could change that. The key is to recognize the snakes overall age and condition and make a logical decsion.