Ballistic Tables and Aim Point

[jjduller1946]

Forgive this question, but I am stumped.

How do I adjust a ballist table for the line of sight being, in my case, 2 inches above the line of fire?

The first table is from Remington for a couple 223 cal rounds. Do I assume this is with iron sights where line of sight is about 1/2 inch above line of fire? Or are these numbers all simply relative to line of fire?

If so, does this table show the correct adjustment for a scope with line of sight 2 inches above the line of fire?

In short, if the table says "0" at 150 yards, should I be hitting 1 1/2 inches below line of sight (right on the line of fire)? Or what?!

Thanks for your advice!

 

[lamazza]

Its point of impact and zero.

 

[Art Eatman]

The first chart shows the distance above or below the line of sight, probably with a scope. I've no idea why they used a 150-yard zero; I've never used anything but 200, ever since the .223 first was introduced. (Whenever that was. 19-sixty-mumble. )

The second chart gives the bullet drop below the axis of the scope (line of sight) with no adjustment for sight-in. That is, the axes of scope and barrel are parallel.

FWIW, with a scoped rifle, sight in a .223 for about 1.5 inches high at 100 yards. That's dead on around 200 and around five inches low at 300 or maybe six depending on which weight of bullet.

My 2¢, Art

 

[jjduller1946]

Thanks..Question

So for a 223 rifle with a scope 2 inched above the bore, and with it on zero at 200 yards, where would I want the stike of the bullet at 25, 50 ,100 yards?

From what I can figure it would be something like:
25 = -1.8
50 = -1.65
100 = -.6

 

[texlurch]

I am confused by the reasoning for the line of sight numbers.

If you know the bullet drop (line of flight, POI), and you set your POA to be zero at 100 or 200, the bullet drop and POA compensation will follow the ballistics table, regardless of where the scope is mounted.

At least in my experience....