Shooting bullets and adjusting their impact to check a scope's adjustments allows errors equal to the accuracy of the rifle and ammo plus the non repeatability of the shooter. A 1 MOA or more error's normal.
If you scope's got 1/4 MOA/inch clicks, you and your stuff has to shoot no worse than 1/10th MOA using the "boxing" method to see if they really are that accurate. You don't measure how thick a human hair is with a yardstick, do you?
Do as Big Al suggests. That's gonna get much more accurate results.
US Navy Distinguished Marksman Badge 153
Former US Navy & Palma Rifle Team Member
NRA High Power Master & Long Range High Master
NRA Smallbore Prone Master
Last edited by Bart B.; April 29, 2013 at 09:54 AM.