ant to switch to rats size question

[MitsuMike]

thank you for the advice...i picked up a frozen rat 48g and my spider bp took it first try...she switched to f/t and rats no problem

80 grams is fine, a little on the high side. Try getting in the 60-70 gram range. That is around 16% the body weight of your animal. In the growing stage that the animal is in, feeding that size prey is perfectly acceptable. It really starts to matter when your snake reaches adulthood to really start sliming down the meals.
Fat girls = slugs
Fat boys = lazy
You want lean mean rat eating machines

Remember the 15% rule is a guideline. Snakes grow at different rates, you don't want to be making a faster growing snake hungry or over feeding a slow grower. If it's the right girth then your fine.