I am not a scope or red dot user, and I have a question on the reticle. It has lines. I have been reading and think I understand the markings. All the examples are using 100 yds as zero, then the next line 200, and so on. What if I zero my scope in a 50 yds, would the increments on the lines be 50 yds? 50, 100, 150, and so on.
I've always used iron sights, so I just raised or lowered the front sight a bit to hit where I want, and the same with windage.
Those lines depend on the optic. You should have directions that came with it, to explain how they work, and they may actually help you determine range.
The 50 yard Zero seems to be the most common and useful zero for 55gr 5.56/223 ammo
I use targets from
with a Bore Scope at 10 yards to get me close enough to zero before I start using ammo.
The theory is the following. [FYI Aim point = red dot, cross hair, iron sights etc.]
At 10 yards, the bullet will impact 1.9" below the aim point.
At 50 yards, the bullet will impact at the aim point.
At 100 yards, the bullet will impact 1.5-1.9" ABOVE the aim point.
At 200 yards, the bullet will impact at the aim point
Here is a comparisons of a 25, 50 and 100 yard zero.
Granted a lot of this is based on shooting from a 16" barrel, so you will have to adjust a little bit due to the fact that you have a shorter barrel, but the nice thing is, you should no more than 2" variation from 0-200 yards, so you really don't need to think about it