Re; wobble. 20 yrs ago just started shooting pistols so I read a lot and still do. Two things I remember were from a bullseye how to article but I think they still apply to us shooting groups. His 1st point was there is always wobble so forget about it and do NOT try to time your shot to fire as the sights move across the bullseye. Get the sights lined up and do a smooth trigger pull and you will be fine. Over time wobble will decrease so you will get better groups. 2nd point was about time and hand/arm steadiness. These numbers are not exact, and would vary by person etc, but give an overall idea. Starting the time your sights first align w/ the bulls eye 0-2 to 4 seconds you haven't calmed yet from the initial movement. From the 2 to 4 seconds out to maybe 15-18 seconds you will be at your steadiest. Beyond that steadiness drops off. With this in mind, when I am shooting slow fire at small or further away targets, I usually shoot 3-4 shots, relax, and shoot 3-4 more and so on. Obviously this only applies to that one style of shooting. One other thing that works for me is my first shot I will often use that 3rd sight picture where you put the front sight covering the bulls eye. Especially in DA, I kind of know I will jerk the trigger a little which will pull the shot low, so I aim a little high.