I had my 6920 out for the first time yesterday. I zeroed the rifle using IBZ method. It worked great. I was shooting at 50 yards. The only adjustment I had to make at the range was 2 clicks to the right for windage. Right on the money. I was using 55gr. Winchester white box ammo.

If I were to engage a target at 25 yards using the IBZ would I just crank the sight up the 4 clicks to the 6/3 position? How would I adjust for 75 yards and 100 yards?

Thanks in advance,

Randy

You don't do a thing, you just aim and shoot out to 250 yds.  

For more precise shooting close up, small aperture and dial elevation to 8/3-2 (bottomed out).  

For fast target acquisition out to 250 yds, use large aperture and leave the elevation dialed to 8/3.

From 300 on out you use the small hole, and set the wheel to the appx range (4 for 400 yds, 5 for 500 yds, etc).

...and set the wheel to the appx range (4 for 400 yds, 5 for 500 yds, etc).

Don't mean to quibble, but the elevation wheel is in meters.  

Yeah, but my eye is calibrated in yards...

Close enough for govt work.