by No1_49er » 07 Oct 2018, 1:10 pm
For $57, get one of these. You can put it in your pocket to take afield and confirm the zero if you have a mishap along the way. Also excellent to recheck the zero if you've ever had to remove the scope, or perhaps change it out to another one. You always go back to the same point. Simple magnetic attachment to muzzle - no mandrels so no possibility of damaging rifling. Leupold used to make a couple of versions, but not available any more.
And like the mirror method, you can watch the crosshairs moving as you adjust. You'll also see if they are NOT moving.
BUSHNELL
BU740001C
MAGNETIC BORE-SIGHTER
MULTI CALIBER
Proud member of "the powerful gun lobby" of Australia