OK. I admit to being a newer shooter with pistols and have never used a red dot sight before. Just got one yesterday for my M&P 5" CORE and I plan to go to the range today. I've done a little reading and all the articles say to have both eyes open when using the red dot. True??
So far I've just shot with one eye closed (right eye dominant) and using fiber optic sights.
I'm using the Burris FF 3.

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