I do not think forcing food down the snakes' throat (which is how I define powerfeeding) is a good idea.

However, I feed my young snakes an appropriately sized item every 5 days. I find that the babies are acting hungry at this point, so I don't see a problem with feeding them. I also have some big females who could eat a large rat (assuming you feed an item as big around as the thickest part of the snake). I feed those females multiple small rats every 7 days instead of one large rat since I don't raise up large rats. I don't think that this is powerfeeding, although it sounds like some might disagree....