The big male albino checkered in this thread might be considered an example of unintentional powerfeeding.
http://www.thamnophis.com/forum/husb...ise-birth.html

He is huge, at only 2 years old, but grew that way withut my intentional action.

Ate a mixed diet, but really went for rodents like crazy.
I just hope the growth doesn't end up significantly shortening his life. Time will tell.