As I'm finally getting the opportunity to start load dev for my 404 J and hoping for a KE & momentum of substantially more than that of the .375 (otherwise I needn't have bothered) I thought I'd also revisit the differences between 9.3 x 62 and .375 I came across this interesting write up.. The .375 Ruger cartridge is faster than the 9.3×62mm cartridge by 480 feet per second. Muzzle energy is the kinetic energy of a bullet as at the moment it escapes the barrel of a gun.
Among those cartridges which are considered the bare minimum for an all-around choice—and that includes the African heavyweights—the 9.3x62mm Mauser and .375 H&H Magnum are undoubtedly two of the best. Which comes out on top? Contributor Philip Massaro examines the pros and cons of each.. 2) How the cartridges compare to each other in terms of performance on game. 3) Compare ammo and rifle choices in each cartridge. 4) Pros and cons of hunting with each cartridge.