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Here's ballistic data for a specific round...obviously environment conditions and bullet data are more than likely different from the specific Canadian event.

Worth looking at for reference...at 2500 yards there's a 2460 inch drop or just around 100 MOA...a Loopy Mark 4 M3 has 72 MOA adjustment and not all of that up...I'm not sure what the Canucks are using...

Tom Miller's Extreme Firearms -Ballistics for the Windrunner


	*Ballistics for the .50 BMG*
	The following information was given to Tom S. Miller by Mr. Skip Talbot, FCSA consultant, regarding the ballistics of the .50 BMG cartridge. This information reprinted with permission from Sierra Bullets Infinity Exterior Ballistics Software. Copyright 1999 Sierra Bullets LLC All Rights Reserved. Atmospheric Conditions Humidity=50% Temperature=45 degrees Fahrenheit Wind Velocity=1 mph @ 3:00 (full value wind) Elevation=5000 feet above sea level Cartridge .50 BMG 800 grain LRS solid projectile (Similar to Barnes 800 grain borerider) ballistic coefficient=1.095 muzzle velocity=2650 fps rifle zeroed @ 200 yards @ 1000 yards velocity=2015 fps energy=7200 ft. lbs. drop=236 inches wind drift=2.93 inches time of flight=1.298 seconds @1750 yards velocity=1630 fps energy=4720 ft. lbs. drop=892 inches wind drift=9.39 inches time of flight=2.458 seconds @2000 yards velocity=1482 fps energy=3900 ft. lbs. drop=1355 inches wind drift=13.6 inches time of flight=3.037 seconds @2500 yards velocity=1266 fps energy=2849 ft. lbs. drop=2460 inches wind drift=23 inches time of flight=4.135 seconds @2800 yards velocity=1159 fps (projectile becomes sub-sonic) energy=2387 ft. lbs. drop=3375 inches wind drift=30.15 inches time of flight=4.88 seconds Information about the Velocity of Sound at different air temperatures 32 degrees F.=1088 fps 68 degrees F.=1129 fps 212 degrees F.=1266 fps 932 degrees F.=1814 fps
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If he was already zeroed at 1000 meters then he would have a bit less guessing wouldn't he?

I confess.....I've never shot anything living at over 400 yards (243 Mannlicher...3X9 Leupold). And 400 yards was rare. I know from reading Hatchcock's writings that he would pick out an NVA/VC in a line of troopers and aim at the one maybe two folks ahead of the guy or gal he wanted. But that was at 800-1000 yards with 7.62 BDL. I have no business talking about such long shooting, I might as well be talking about nuclear physics or labor pains...LOL

Regards.

My Mannlicher was zeroed at 100 yards. West Central TX whitetails....standing or grazing and me at rest. I aimed maybe 8-12 inches above the shoulders and hit the lower lungs. Anything past 4-500 yards even stationary is brave new world for me....but I aim to try it out someday.