It doesn't get any better than this, regardless of barrel length! I think cleaning the ink blob off the center of my red dot sight helped a bunch as far as consistency goes. No terrible shots out of 60, and the last 10 of the sixty were good instead of being lousy due to less eyestrain I think.
https://youtu.be/37H2KeX3q_0This is fun. But it isn't easy.
Joe L