We had a good drill I recall learning from Jerry Jones with OpSpec Training that might help you. Jerry called it the "bump drill" (Which I think he got from Bruce Gray)
Basically start at 3yds and work your way back over time. But distance isnt the real thing.
Come up on target, take out the slop/slack until you feel the wall.
Now with tiny movements, press the trigger a little bit and relax the takeup you just got, again a little more and let back out (maintain contact with the trigger and the wall dont let the slop creep in) again a little more (1/32 -1/64" more each time each time maybe?) until the Bang surprises you.
The idea was to see how many perceptible "bumps" you can get before the bang. Each bump you're taking a little more of the wall.
In theory you can do it dry firing as well.
Do that for a couple of hours straight (I think we did it for like 50-100 rounds) and you'll have a MUCH better feel for your trigger!
Here's Bruce talking about it.