I'm glad there were good opinions on this because it's clearly something that has a different meaning for some of us.
FR's comments make sense and I understand and respect his experience. If he was one of the pioneers in colubrid breeding (and I'm assuming he's telling us the truth) then we all owe a debt of gratitude because we have it easy in comparison. I also agree with him in regards to trying to follow nature as much as possible when keeping snakes. I'm a field biologist and more specifically a botanist and although I don't garden (hate it - why plant what is in front of you every day? Nature is one big garden anyway) I can look at plant or many reptiles, and from my 15 years of experience all over jot down notes, remember things and mimic pretty damm well what I see, OR realize that I can't mimic closely what's in nature, etc.
By powerfeeding I mean the modern practice of overfeeding your snake on a regular basis. The definition of overfeeding? Well, FR has a point that snakes will eat as much as they can, but I'm talking about captive snakes. To me overfeeding is supplying a snake a diet steady diet of what would constitute more than they would get over the course of a year, for example. Again, infer from nature. Snakes - save some exceptions - are not going to have a regular diet of a similar type food at regular intervals - that's just a fact. Their own life history, i.e. their adapated metobolism of being so effecient at using energy, is a clue that they have not evolved to being fed a regular diet of the same thing.
SO, that being said, to me powerfeeding is plugging your snake with more mice than one would expect it to have at any given time in nature at regularly scheduled intervals.
The fact that you can so easily pork a kingsnake up is also a clue from nature...you don't see it that often, at least I don't and being a botanist with my eyes on the ground looking for things that are 5mm across I see a helluva alot of herps during my time in the field.
In any event, overfeeding your snake is not healthy and not a good practice for those who really care about snakes - at least kingsnakes in terms of this discussion.
-John



anyway, if a snake is fed "a lot" and converts it to growth and grows rapidly, but at its adult size has a normal girth, is that overfeeding? Even if it gets food at different or more regular intervals than it would have in the wild? Or if it achieves in 3 yrs the size the average wild specimen would achieve in four? (that's speculative anyway because this conversation is in the absence of documented field studies of sizes).