[The Guru]

When I say 300m I mean a 300 Mag. Its one of the biggest guns you can buy. They use 300m to shot whitetails at about 500 yards and drop them. Also they use this gun in Africa for their big wildgame because it is so powerful.

300 Mag. kicks on both ends (If you know what I mean)

The 300 Win Mag is actually considered a medium bore rifle cartridge. In Africa, when shooting the really big boys, the 375 or 458 Win Mag are more commonly used, they have some real knockdown power!
The 300 Win Mag is a great choice for Elk, Moose and Bear. But is really a little overkill for whitetail. And as far as 500 yard shots, less than 5% of the hunters out there could even hit a whitetail, let alone be sure that they make a clean kill. If you are not fully sure that you could take the animal with one well placed shot, then the ethical thing to do is pass and wait for a better shot.