Apples & Oranges......
"Groups" are a compound thing. "Instinctive" shooting is about consistency....
Putting every arrow in the "kill zone" every time. I shoot 1 arrow at a time, Shoot it, and go get it.
If you hit it, Good! If you didn't, figure out "why" on your way to and from the target...
I shoot with a bow quiver & 4 arrows. 3 broadheads and a Judo, just like when I'm hunting...
I take one arrow out to practice, just like when I'm hunting. I start close, 10yds. When I can put EVERY arrow in the kill zone of my 3D deer target, I move back a couple yards. By deer season, I'm usually back to 25-30 yards.