About the military marksmen, I really think that precision, offhand open sight shooting isn't really something they do much of. The best Olympic shooters in the world would probably have trouble with marksmanship tests for the military without some serious practice. From what I understand, it's a 40 round test firing from a variety of different positions at randomly appearing targets from 25 to 300 meters outside in the wind.
Don't bet on it. I've taken Collage International Small bore shooters to the High Power Range and the 40 shot pop up range, letting them fire the course of fire with (then) M14s on the HP range and M16s on the qualification range. These kids smoke the average military shooter big time, and do quite well off hand.
When I ran the AK NG Marksmanship I always got these kids out hopping to recruit for the Guard and My Rifle team.
ISU shooters shoot 300 meters, where the target scoring rings are much smaller requiring precise wind est. The shot three position, Standing, Prone and Knelling. They have zero problems adjusting to the field conditions used in the Qualification Course.
Granted, some of the smaller kids had difficulty with the recoil of the M14, but that went out the window when people started using ARs in High Power.
When it comes to pure fundamentals its hard to beat International Shooting.