In a way, most calibers are redundant. Like was previously said, bullets matter more then caliber. ELDX, ELDM, TMK in that 6.5 will kill an elk every single time you put it in its lungs. No need for anything bigger, but that doesn't mean you can't. I have 338 RUM, 3 300 WM, 6.5 PRC, and a 7...