After hitting the range today, I was able to shoot pretty consistently at 50, 75 and 100 yards using CCI 1070fps rounds. My local range has 7, 15, 25, 50, 75, 100 yard increments.

I first did the Revised Improved Battlesight Zero mod explained here...

RIBZ - - Revised Improved Battlesight Zero (now with down-loadable 50 yard zeroing target) - AR15.COM

After performing the mod, I can now use the 6/3 setting as a base zero with the ability to raise or lower the rear elevation as needed. Before the mod, my rear site would bottom out before getting to the 6/3 setting.

I zero'd my rifle at 50 yards by only adjusting the front sight height and leaving the rear sight at the 6/3 setting. Remember that the front sight adjustment is opposite of the rear. To raise your groups, you lower the front site. I also used the small aperture only. Using the calculated trajectory for my ammo, I determined I would be about 2 inches low at 75 yards and 6 inches low at 100 yards with a 50 yard zero, 1070 fps, 2.5 inch sight height.

I've read that each click of the rear elevation should equal 1/2 MOA. So I tested it out and it seemed to work. To shoot 75 yards I raised my rear sight by 5 clicks clockwise (2.5 MOA) from my 6/3 setting (known as 6/3 +5). To shoot 100 yards, I raised it 12 clicks clockwise from my base 6/3 setting (6 MOA) (6/3 +12).

So maybe this info will help a new shooter like me. Just remember that 1 MOA = ~1 inch at 100 yards.

25 yards: 1 MOA = 0.25 inch
50 yards: 1 MOA = 0.50 inch
75 yards: 1 MOA = 0.75 inch
100 yards: 1 MOA = 1.0 inch
200 yards: 1 MOA = 2.0 inch

Knowing that each click of elevation = 0.5 MOA, you can easily adjust your rear sight for each yard increment you plan to shoot without having to re-zero your sights. Like I said, I am new to shooting and thought this was really cool. I was surprised to be hitting my target at 100 yards using the stock sights. Granted, I could barely see the target at 100 yards, but wanted to master the stock sights before upgrading to a red dot or scope.