Only once, when I was a teengaer and made a naturaly carbonated batch of Root Beer. Since I've been brewing beer, the only time I over primed was when I made a batch and a half, and was out ot sugar. I emptied the sugar bowl into the pot of boiling water, 'about' a 1/4 cup. Then i emptied the canister, another 'about' a 1/4 cup into the pot, then I emptied the leftover of brown sugar, 'about' 1/4 cup. I guess all those 'abouts' were a little high...
So far, I've had more experience thinking than I've had brewing....you don't think they are mutually exclusive, do you?
57 batches so far,
33 wine, mostly Loquat, peach, plum, prickly pear
22 beers and ciders
1 Tequila, from a prickly pear wine experiment that didn't work. I call it "Prickly Heat"