Why was the wind a non-factor? Was it blowing steadily from one direction? Or was it switching a little?

We still don't even know the bullet/velocity, etc. A 5 mph wind (which many shooters would consider a non-factor) switching back and forth can result in considerable effect on groups at 200 yards.

“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.”
John Steinbeck