Actually, Jim Carmichel considered 338 Win Mag "performance very close to that of the larger .375 H&H." Indeed, the cartridge was designed to give 375 H&H performance from a standard length action. Carmichel considered it well-suited to large bears and cape buffalo (although not legal for buffalo in many countries). As Carmichel is one of the very few gun writers who can actually shoot, I consider his opinions worthy. As a stopping cartridge the 458 Win Mag is superior, but as a hunting cartridge for game from deer to (but not necessarily including) buffalo, the 338 Win Mag is better.