So I'm sure this has been asked before, but a couple searches didn't turn up what I was looking for. So I've identified the amount of sugar I need based on the amount of atmospheres of CO2 I want in my beer, add that to some boiled water and then pour it into my bottling tub and mix. A few times, however, I've found some bottles end up less carbonated than others, all other things being held constant. Should I really be stirring for a while to make sure the sugar gets equally distributed? Or letting it sit for a while after stirring? Or making sure I mix in any settled yeast at the bottom? Any thoughts at all? I haven't been particularly diligent about stirring before bottling, but usually do try to give it some lazy swirls for a minute or two-trying not to disturb any sediment at the time.