Well the .300 blackout isn't of the 10 family it uses the same bolt face/carrier as a .223. So in that essence it's an AR15. So using supersonic ammunition with that gun my limits would put me at 200yds for me personally.
"Combined synergy of a man and rifle is matchless, the steadiness of hand and acuity of vision, and finally the art of knowing how to make the rifle an extension of the body, all equate to the ultimate synthesis of man and machine."
"Death smiles at us all, all a man can do is smile back."