OK, I really try to be fair. I will post to you one last time, so I'm full of crap too, I guess. Anyway, I've just posted long enough to see one simple matter. This 25 yd. thing is just wrong. Works OK with Garand sights, not so much with a high scope where you have to keep your head up. Pretty well known in the sillouhette game. Yet, you post crap about barrel vibrations. You know that 1/30" (2 inches at 100 yards, or 2 MOA) is less than 0.010" at 25 yards. How do you measure that precisely? Sorry, but, I'm now done.