I get the impression that you assume the opposition will be armed with AK-47's or AR-15's and have lots of ammo to expend in the fight. And they will out number the guy armed with the Scout Rifle and the fight will occur at close range.
That's alot of assuming.
I'd say for the guy that shoots once and moves, especially if he picks the ground, the advantages of some guy armed with a semi auto are not much, if any.
From what I've noticed, even cops rarely run into guys as well trained and armed like the Miami Shootout. Over the years, I've only known of three, one of which was this one. E