First Focal Plane 1-4X or 1-6X or 1-8X
I use an SS (Super Sniper) 1-6X on my 16" carbine. Clean sight picture at 5 feet, and I shot it out to 500 yards a few weeks ago. At 1X both eyes open works very well, and very fast. Just be sure to get your sight height correct (not difficult with all the great mounts made now days) fast, comfortable sight picture and it will work well.
800 Yard Steel Range
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