Additional thoughts--

I have talked with a math oriented friend VM who was intrigued. Given that the fellow closed his eyes and hit the animal perfectly through the heart the odds come out at several million to one for that event to occur--kinda like winning the lottery (irresponsibly).

The ballistics of a 150 gr bullet at that distance are 1062 ft pounds energy,180 inches of drop(15 feet), and lateral movement of 160 inches(13.3 feet) with the wind. A standard hunting rifle shooting 1.5 MOA accuracy would have a circle of probability of 13.5 inches where the bullet could possibly land in an animal with a 24 inch depth chest. No more than 8 inch kill zone is reccomended(lower 1/3 of the chest depth), ie suggesting a distance of no more than 500 yards under perfect conditions.Numerical data but still validation of logic. In other words an absolutely absolutely insane shot to attempt even by a master rifleman.

When marine snipers engage personnel at over a mile distance with a 50 we are talking a human torso heigth much more than the elks 24 inch depth and thus a higher chance of a hit with a spotter and perfect conditions--

Personally I feel that past 450 yds is iffy on game animals even with optimal environmental conditions due to the rapid increase in bullet falling descent with distance + the lateral movement possible. From what I read Boddington agrees.