Looks easy enough, thanks for sharing.
However, like nervoustrig said in the linked post.... — this system works in an ideal airgun universe....
For example, if my scope rail is not perfectly perpendicular to the bore (the interior of the barrel) then this little device will simply
align my scope with the misaligned scope rail.... If I understand this correctly, the critical alignment of the scope to the gun is
the alignment of the vertical crosshairs to the bore.
I achieve that by aiming at a mirror about 5y* away, and turning the scope in its loosened rings until the vertical crosshairs intersect with the muzzle.
This assures that when I adjust my scope elevation turret the reticle will go straight up/down, instead of diagonally. The same applies if I use holdovers with the reticle.
*[5y suggested by jarmstrong below, for a 10y parallax]
The second step I use (thanks to the forum members' advice) is installing a
bubble level on the scope (not the rail — because again, the rail can easily be misaligned).
For that I aim at a plumb line in the distance. When the vertical crosshairs are aligned with the plumb, I rotate the bubble level until it shows level — and tighten it down.
Before a shot I take a quick glance at the level — that way I can avoid any cant of the gun, which would throw of my POI when shooting at a range other than what the scope is zeroed at (both holdover or turret dialing...).
Matthias
However, like nervoustrig said in the linked post.... — this system works in an ideal airgun universe....
If I understand this correctly, the critical alignment of the scope to the gun is the alignment of the vertical crosshairs to the bore.
