Ok if I shoot $20 ammo my gun shoots lights out at any yardage,
You might want to define that so we know what you're hoping for.
Anyway, when I bought my AR, I bought a box of 150 Federal American Eagle for about $45. This:
I can't tell you the exact group sizes it produced, but I was shooting with an unmagnified red dot (Aimpoint Pro), and the groups were small enough at 100 yards that the dot covered the group and the center colored portion of the target, which I think was somewhere around 6 inches in diameter, so less than 6 inches? And I'm not a great shot, so I'm going to assume 5 inches of that was me.
At the end of the day, you can bet the premium match ammo is better than mid-grade, and mid-grade is better than cheap-o, but that is only MOST of the time. There may be cheap ammo that shoots like lasers from your rifle, and their be match ammo that shoots like junk. So there's really no "Will this ammo shoot acceptably (and undefined) small groups in my rifle?" It's one of those questions only you can answer through trial and error.
Or maybe the answer is simply "Maybe?"
Let us know how it turns out.