I am not a ballistician...heck I aint even very smart but I have seen the smaller MOA groups at longer ranges several times. I have an extreme example with my 30/06 AI shooting 208gr A-Maxs. My groups at 100 are unsuitable barely MOA. However at 800 yards it has posted some groups well under 1/2 MOA. The only way I can figure it is to envision a line that is the intended path of a bullet, then envision a path orbiting or rotating around the intended path in decreasing orbits. I cant explain the opposing forces acting upon the bullet to cause this.
If the orbit around the intended path is basically a bullets width it will appear to be 3x the actual variance on paper.
