I'm not exactly an expert by far on trajectory of rifle bullets since I've never shot beyond 200 yards and actually hit anything I was aiming at. So I was wondering if you guys would be willng to skool me on a bit of info for rifle bullets, particularly the .338 types. I was looking at ballistic charts yesterday and I found an odd cartidge I'd never heard of; a .338-378 Wby. Weatherby is a good brand of firearm for the avid hunter and isnt an entry-level rifle maker. From what I gathered from the ballistic chart the .338-378 Wby had more energy at 500 yards than a typical .338 Win Mag and about the same average deviation at the same distances. My question is why arent people attracted to the .338-378 Wby as much as the .338 Win Mag? They use the same bullets and the Wby has more energy than the Win Mag, so why not?