So I got home from work today and tried my pale ale that has been bottled between 2&3 weeks and it's flat. Very tiny head when I poured it into my jug, tastes beautiful but flat. Only thing I did different was I used raw sugar to prime my bottles not white table sugar. Bottled into screw top tallies and used a bench top capper to put the caps on. Does anyone have any ideas why this happened or did I just open two dud bottles?