I do not have a semi auto in my line up currently & am leaning towards one of these two. I had two ar's and have decided to go a different way. This will be a short range rifle outfitted with a red dot only. Whichever I choose, I will be laying in a few cases of ammo for it as well as spare mags. Pinpoint accuracy is less of a priority than steadfast reliability & durability. This is not an eotwawki thread but suffice it to say that I have my concerns. For these requirements would you choose the 5.56 or the 7.62?