First off, the manufacturer says 1.5 MOA on your 556 NATO Bison, 8 twist 16.5" barrel. That rifle has a Trigger Tech, so, if it doesn't shoot as promised, it's one of two things, it doesn't like the load or it's the shooter.
The advice you received and will ignore was to shoot heavier bullets. You also claim to not know anything, which I find to be a bald face lie.
You and your type are the very reason people have a bad perception of hunters and shooters, you want to be an idiot, don't drag others into the fray. Pontificate to your hearts content, just do it silently in the corner so as not to attract attention of window likkers.
Back to your idiocy.