Re: Group size
With any gun I've had, I could find a seating point where very small changes produce very big results. I'm absolutely convinced that bullet seating is as big or bigger than primer changes and way bigger than ANY amount of powder change.
Afterall, you could not open your groups from 5/8" to 2" with powder alone. Right?
With this, it never made sense to me that people would just pick any ole seating while load developing with powder, and then attempt to change seating -while expecting improvement.
That amounts to setting a coarse knob at a random position, then adjusting a fine knob for pseudo-tune, then adjusting the coarse knob(as though a finer adjustment).