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:
- Estimating the range to the target if you know the size of the target or a nearby object
- A formula can be applied to calculate the lead on moving targets
- Making corrections for follow-up shots is pretty easy once you master the calculations for mil dots (down to a tenth of of a mil-dot)