Rifle Scopes 10 MOA/IPHY test

Re: 10 MOA/IPHY test

String level or plumb line?

Level the rifle and while its level check the verticle line of the reticle against a known vertical (plumb bob, building edge of a large building in teh distance, etc).
 
Re: 10 MOA/IPHY test

It was a small string level which, I placed on top of the turret. I placed the rifle on the mag well sitting it on a table that I checked to be level.