For myself, I expect a level of accuracy with what ever gun I am carrying where I can deliver a head shot, under pressure, at a distance out to 7 yds.
That being said, a 3~4 inch group @ 30' will stop a threat. Continue practicing....muscle memory is a good thing.
This was with my Ruger LCR
, which is double action only, shot at 5 yds. The tape is 1" square. I can cut that in half with my XD9sc....the difference being the trigger.