Unfortunately, no...
Snakes will grow as much as they eat, of course they grow faster in the first year but if given smaller meals they will be quite a bit smaller than one that has larger meals or a better appetite.
At 700 grams, she could be one that ate very well and could get to that size within a year, or she could have had many fasting periods or sporadic eating and could only be 700 grams after many years.