Hi TigriTo, this is the info i got from Asbit and several others confered thats this is a good bet. HOpe it helps
"Your best bet is to invest in an digital kitchen scale that weighs in 1gm increments and weigh her weekly. Weight or the size of the feed as compared to the size of the snake, is how to judge what to fed not by the length or age of the snake. Weight is easier, than guessing a meal that is approx. 1.5 times the girth of your snake. As was previously mentioned, if the snake is over fed, it will regurge and that is very stressful and hard on the snake! On here there is a gentleman who posted an guide to feeding based by weight of the snake and weight of the food. It is really useful, and when shown to my reptile vet, he recommended I continue as it was an excellent guide to feeding our corns and even our king. I will paste it in for you, but remember this has not been created by me it was created by Roy Munson.
The Munson Plan (Sample Feeding Chart): Revised 06/08/08
-When they're on single pinks (2-3g), I feed every 5-6 days. (Snake = 4-15g)
-Double pinks (3g x 2) every 5-6 days. (Snake = 16-23g)
-Small fuzzies (5-7g) every 6-7 days. (Snake = 24-30g)
-Regular fuzzies (7-9g) every 6-7 days (Snake = 30-50g)
-Hoppers (9-12g) every 6-7 days (Snake = 51-90g)
-Weaned (14-20g) every 7 days (Snake = 91-170g)
-Adult (20-30g) every 7-x days (Snake = 170+) See below.
Note: Adult females are fed more frequently than adult males (especially following brumation). Adult females are fed every 7-12 days; adult males are fed every 11-14 days.
This is by no means scientific, and not all corns will cooperate 100% with the schedule. The weight ranges I gave for the prey and snakes are approximate.
Good luck, this will work great for you, my 3 corns and 1 king have done very well on it, and the Vet is very impressed with their growth and health. The only thing the Vet said to add was, calcium powder to the mice until the snake is regularly feeding on adult mice, as the other mice either have no bone or not enough to provide adequate calcium"