Re: nightforce or uso?
I used a scope with a Horus reticle for three years. I like the reticle. One day, though, it occurred to me that I didn't need it.
Here's a quote from the link posted below:
<div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">You are most likely to want to use holdovers and holdunders at relatively short ranges.
Consider the typical dope chart for a .308 above. Using a 100 yard zero, you can use that zero on a scope with 5 mils of marks below the main crosshairs to shoot out to 600 yards, without touching the elevation dial, using only holdovers.
To calculate those holdovers, just divide your MOA data by 3.438 to convert it to mils. Using the typical chart above, that will give you the following holdovers, rounded to the nearest 10th of a milliradian:
<div class="ubbcode-block"><div class="ubbcode-header">Code:</div><div class="ubbcode-body ubbcode-pre" ><pre>
Range HoldOver
100 0
200 0.6
300 1.5
400 2.3
500 3.3
600 4.7
</pre></div></div>
Memorize those numbers, or whatever applies where you mostly shoot, and you’ll be able to hit targets out to 600 yards without touching your scope. Nor will you have to remember which way to hold, because it’s all holdovers, just like using a Horus reticle. And that is the essence of efficient fighting with a precision rifle.
</div></div>
(from
Calculating Holdovers and Holdunders.)