Sig Sauer m400 tread shooting at 300 yards. 11.5 inch barrel.
The thumbnail is shooting at 100 yards using 5.56 Hornandy Frontier ammo (55 grain) getting sub moa excluding one flier. The video is using the same rifle and ammo at 300 yards. It was a slightly gusty day. Red dot Romeo5 no magnification. The circular steel is 1 foot in diameter to give a size perspective.