Feeding percent rule

[Skiploder]

So is 15 to 20% the new rule or is it still 10% and would 20 be considered power feeding if it's still 10?????

The rule is not a rule. It is not based on anything nor backed by anything that simulates a proper caloric model. In general people overfed their captive reptiles.

PM me if you would like a calculation of an average caloric intake for a ball python. You can then vary prey sizes and establish a suitable feeding strategy.