I would like to know what do you consider power feeding?
In all honesty I have younger animals that I feed more often, every 4-5 days... they get 30-40g adult mice or rats.... Their growth has been incredible....and their appetite is still just as ravenous as my snakes on a 7 day schedule. I definitely don't recommend that feeding schedule to everyone, but it works for me.
To some what I do may be considered power feeding, but to me...power feeding would be a 4-5 day schedule with the biggest rats you can stuff a snake with....however, more times than not those snakes eventually will go off feed.