How does it shoot without the tuner? can it hold the vertical plane meaning bare barrel the shots will remain generally within the same vertical line. in example notice the above group marked 45 is nearly the same group size and shape with a tuner versus the no tuner group. the other target shows what I am talking about holding the vertical bare barrel.But straight, look at all that wasted ink!
You could accomplish the same thing with a Grid,
then save on target purchases or printer supplies.
Lee, my rifles are as mechanically correct as I can make them.
Factory barrels replaced with Lilja or Shilen, EPS chambers.
3 lb pull OEM triggers replaced with adjustable sear and pull triggers.
Receiver pillared and bedded, barrel bedded or
installed into a barrel block platform that minimizes barrel harmonics.
Bolt and firing pin polished, tip reshaped to focus the strike,
springs replaced to provide a consistent impact on the rims,
head space tenon shimmed to avoid slop when chambering.
My real problems are ammunition quality, wind and that I'm a technician.
I can improve my results to the limits of the equipment,
but appear to lack the talent to push beyond those limits.