"Ray Calvert" > wrote in message
. com...
> Most jugs and carboys are rated where they are filled to a point that is
> much less than you would use for a topped up wine carboy. The difference
> can easily be 2 or 3 liters or maybe even more. Most of my 5 gallon
> carboy's will hold 5.5 gal's. Some of my 6 gal carboys will hold close to
> 7 gal's. You eventually get to know your carboy's.
>
2-3 liters seems highly unlikely, no matter what your source of carboys is.
We have measured overages in the area of 3/4 of a liter in the 5 and 6
gallon sizes.

Brian