Cane and corn sugar are both 46 points per lb/gal, so a pound in 5 gal. gives you 9 points. And don't forget that the ABV impacts the gravity of those wines you tested. My latest blackberry wine is about 15.5% and 0.991. Backsweetening to 1.010 would mean 2% residual sugar, not 1%.
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Last edited by david_42; 12-23-2009 at 04:58 PM.