Quote:
Originally Posted by Swank
100m.
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Then why not zero at 100m.? It is not like the shorties are going to be useful at extended ranges much beyond that.
If you zero at a shorter range, you will be low at 100, longer range and you will be high at 100.
The bullet flies in an arc, like a rainbow. The 1.4" of the sight plane above the bore on the M-16/AR-15 series weapons exacerbates this effect. It crosses the sight line twice on the way to the zero target, once on the way up and once on the way down. That is how a 25m. zero puts the bullet on the target at 300m, and can hit all of the targets on the qualification range from 25 to 300m.
For this application, unless they are shooting almost exclusively closer, or further, I would leave it at 100, and shoot the intermediate distances to determine the holdover (or under).
Just my .02, YMMV.
TR
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De Oppresso Liber 01/20/2025
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