I don't know Steve, the idea for our best guys is to only take one shot, then get out of dodge.
Granted, MOST of thier shots are not 1000 yarders, but the training suggests, that if the average grunt (marine) with an m-16 can poke you at 300 yards, you had better be at least 500 yards away before you take a shot, preferably farther.
I don't think these guys do thier jobs making those shots with blind luck. They train to do this stuff for a living, hours a day practicing.
If us armchair commandos trained like they do, we'd all be bragging about 1000 yard shots.
To date, my longest made shot on big game was just over 400 yards. And it took me years of misses to be able to say I made that shot. But I'll say this, I don't miss much anymore.
And I'll also say this.. shooting a Barrett .50 of a bench almost doubled my effective range, as I was nailing a 10 inch smiley face between the eyes at 600 yards. I thought that was pretty good for someone who had never handled a Barret.. but KNEW how to asked the guy that sighted it in, how low to hold the crosshairs, knew to practice breath control, trigger squeeze etc.
Just thank god I didn't have to lug the damn thing up a hill, through a creek and into a hidey-spot to make the shot.