I buy Woodbridge Red Zinfandel. Let me see if I can find the article for him to read. According to the article the best is a Zinfandel with about a 16% alcohol. Woodbridge is slightly more that 15%.
But I'm game to try making my own...the Woodbridge is about $7 a bottle and making my own comes out to less than $2 a bottle. And according to OT, I can get the alcohol content higher, but I don't know how...I suppose I'll figure it out.
I've seen Woodridge at our favorite liquor store. I'll ask them about 16% zins. They are always very helpful; they'll be able to find something for me.
*Shrug* I just let it work til it won't work any more. Seems stronger than store-bought to me (and confirmed by Sister.)