In the last 3 years I've made about 10 six gallon wine kits: 5 chardonnay, 2 cabernet sauvignon, and 1 tempranillo. I yield between 27-28 bottles. Is this normal? I
Completely normal. I think the common estimate is 30 750’s.So you are coming up a bit short.
I get 5.5 750ml per gallon so my yield for 5 gallons would be about 27 bottles more or less