I wonder if I am using too much priming sugar. For a 5 gallon batch I am using 5oz of sugar to prime. First of all, and this may seem stupid but are we talking 5oz of weight? Using the metric system I was not aware that oz. was weight because I have this paper that shows how to convert oz. to cups. It seems to me that this would not work, converting weight to volume...Secondly is 5oz. too much? All my beers have this bitter flavour that tastes like it might be this, and it can't be too much hops because I just tried my porter beer which has half the hops of some other beers I've made and it still has that same flavour.