That is true, but sometimes you dont always make or have the perfect shot. A lot of times you only get 1 opportunity when elk hunting, and I'll be danged to be limited by the cartridge, whether it be range, angle, or a misplaced shot. That is all. In a perfect world, a 243 would always kill elk, but alas that's not real world elk hunting. I've killed a few with a 2506 on up through 338 EDGE. They all worked, but I had to be limited by range and angle with the 2506. The 7/30/33 cal mags are a lot more forgiving in most areas. I've been around 200 elk killed the last 20 years in our camp on public ground, 95% were with 7/30/33 magnums from 50 to 1125 yards, they just work. I dont like chasing elk down in the deepest darkest hole, I like them to drop where they once stood as it's still a long pack out. I've also been the one to load and set up such said rifles, so I have a fairly good data plot to go from and experience with my own eyes.