MOA or MILs for my optic?

Now that we know the difference between MOA and MILs for reticles, which is the better option for a caliber like the 300 BLK? Using both supersonic and subsonic ammo requires the user to manage the details of vastly different trajectories. Optics designed specifically for the BLK manage this by offering a dual reticle that has BDC (Bullet Drop Compensation) markings for subsonic on one side and supersonic on the other side. Here is an example of one:

This doesn’t fulfill my needs though- what if I want to move my optic to a different gun? What if I decide tomorrow that .308 is my new favorite round (unlikely but you never know)? I’m a big fan of items that can be used for more than one purpose- and if you read the fine print in the image above you will notice that the drop reticles are specific to an exact projectile weight, velocity and barrel length. So if you want to use a 208gr A-Max subsonic round the BDC reticle of no longer accurate and you need to start figuring out adjustments.

So back to MOA or MILs : which system will be more useful for the BLK and other rifles? 

The MIL system has lots of appeal to it- once you become proficient with it you can enjoy many benefits like:

If math problems like this one are not easy for you to do in your head you can purchase a funky slide-rule called the Mil-Dot Master. Or make a cheat sheet card and carry it with you. 
And that is where I have to draw the line… That’s too much extra effort to figure out a shot for me. I’m no math wizard and I can’t ever fathom using my trusty slide rule to figure out how many dots to use to lead or hold over a target. With all due respect to the system, which is used every day by many professionals around the world, it’s not for me.
Now look at the MOA reticle below. While you need to know some reference points on the trajectory of your ammo if you run both super and subsonic rounds in a BLK, those numbers are easier for me to memorize than doing a mils calculation when you are using the secondary ammo (you zero the optic for your primary ammo, right?) And no matter what, 1″ at 100 yds = 1 MOA, 2″ at 200 yds, 3″ at 300 yds, etc. 
So when I am zeroed at 25/150 for 147 gr supersonic ammo I know that my holdover is 2 MOA at 100 yds and 4 MOA at 50 yds. And I didn’t have to use a slide rule to figure that out. This image from precision rifle blog pretty much sums it up for a guy who doesn’t visualize centimeters or meters too well:

2 thoughts on “MOA or MILs for my optic?

  1. Pingback: Burris Signature Series Zee Rings – Dial MOA in the Hardware | ballisticxlr

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