Ok.
To start with, mount the scope so that you have a comfortable amount of eye relief in your most common shooting position. Typically about 3" from the rear lens to your eyeball is normal.
Second, flip the little sliver tab (called the "Gate") on the rear of the scope up. This will allow the elevation wheel to roam freely. Bring the elevation wheel completely to the bottom, then count UP 65 clicks.
This will give you an estimated elevation zero.
For windage, look at the front of the scope, and you'll see a little vernier there...put it roughly in the middle, and go to the range to test-fire and adjust.
If you're a little more advanced, and want to bore-sight the rifle, follow along here:
1. Mount scope with proper eye relief.
2. Remove upper from lower, remove bolt/carrier from upper.
3. Fix upper in place so you can see an object through the barrel (approx 100m away) Do not clamp into a vise...you don't want to crush things. Get something fairly firm to hold it, but don't clamp too hard.
4. Object being sighted on. I normally sight on a fence-post or a telephone pole. This provides a nice vertical bar, which is handy for windage adjustment, and the cross-beams are good for lining up your elevation.
5. Sight on the object through the bore. Line up on a vertical object first, and adjust your windage. Then, once your windage is set, find a horizontal object and sight that through your bore, and adjust your elevation.
6. Re-assemble your rifle, and test-fire.
7. Note, for the first few rounds, don't aim on your paper, pick a spot in the dirt behind/around your target, and fire at that (rock/tuft of grass/etc) object to see how close you are. Any gross errors will be easily noted with a single round, and you can adjust quickly to get yourself on target.
8. Corrections. Both windage and elevation clicks are approximately 1" per click at 100 meters. So, if you're 6" low, adjust up 6 clicks.
9. Groups....adjust based on 3-5 round groups initially.
10. The above bore-sighting method has worked for me a number of times, and with experience, I usually put the first round on a 8.5x11" sheet at 100m.
Hope this helps,
NavyShooter
