no, you will expose the wine to too much oxygen. When you rack to secondary (carboy) you will not fill the carboy all the way up until you stabilize. One the fermentation is complete it is essential to top the carboy up to 1"-2" below the stopper. If you don't do this you risk oxidizing the wine as there is no CO2 blanket protecting the wine and your wine will be exposed to oxygen. It will spoil.You can rack a 5-6 gallon kit into 5-6 one gallon jugs though.
This is on reason wine makers have a variety of carboy's of different size. I have three 6 gallon carboys for kits. I have 2 five gallon carboys for scratch wines. I have two 3 gallon carboys for smaller batches as welland an assortment of one gallon jugs.
Smurfe Edited by: smurfe