OK...I voted for the 250-300, but mine really vary quite a lot. I have a few that are over 300 grams and some that are as small as 150 grams. I have decided that a lot of the growth simply depends on the snake.
All of mine were on the same feeding schedule, by the way. When the snakes were hatchlings and on pinks, I fed them every 4-5 days. After I switched them to fuzzies, I started feeding them once a week. That is still my schedule for them (except for the ones brumating).