I have the m223 with Bdc on my ar. Great wee scope, can shoot 1 moa out to 400 consistently and make regular hits further out. It's calibrated for max mag with 55gr polymer tip doing 3200fps from factory but you can use their online calculator to print out drop chart for your own load. Still requires checking though.
The nikoplex is still calibrated for the same round but you zero at 100 yards and it just has 100.200-600 yard markings on the elevation turret.
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