I think Ray is right.
Here is a quote from ArmeFrance.com:

". 470 Capstick - This cartridge was designed by LTC Arthur B. Alphin and named alter the famous author, Peter Capstick lt delivers the maximum killing power possible from the H&H belted headsize while retaining the greater magazine capacity of the H&H headsize over the Weatherby or Rigby headsize. lt delivers 500 grain bullets at 2400 feet per second. This gives it good ballistics on paper. However, its greater diameter bullets deliver distinctly more shock than any of the .458's or .460's. lt definitely kills better than its paper figures indicate. lt is an excellent cartridge for heavy game out to 200 yards and dangerous game at close ranges. lts trajectory is also flat enough that shots can be placed un medium game at ranges up tu 250 yards. This cartridge, when used in an A-Square rifle, is still within the recoil threshold of the occasional hunter. Despite its lesser energy figures, the 470 Capstick's greater shock transmission (from the bigger bullets), lower recoil, and greater magazine capacity make it a preferred choice over the .460 Weatherby. For the man who wants a heavy rifle in order to round out his battery, or to complement a .338,.375, or similar cartddge, the 470 Capstick is near ideal."