Stop drinking coffee before shooting! Really, it makes a huge difference, ask me how I know. That goes for any caffeine source. As far as wobble goes, I start below the target and prep the trigger as I bring the reticle up to my desired poa in a controlled straight up manner then break the shot as soon as it's where I want it. I make no attempt to hold on the target, I can control movement in a up/down direction a lot easier than stopping the movement altogether.