I know there are several variables to consider but I have a question on the amount of priming sugar I need. I just poured a robust porter and even with a very easy slow pour I get a HUGE head from this stuff. So much that it is a pain. It is not infected as it tastes great. I always use 1 oz of corn sugar per gallon of beer but I think for the darker heavier beers that is too much. I have brewed a VERY light grain bill and use 6 oz ( per instruction from my brew shop guy) and it was perfect. Can someone educate a beginner in an easy to understand manner?