An interesting "new" cartridge is listed in the 1962 Parker Ackley "Handbook" (pg. 442 1965 ed.) as the 30/378 Arch. A 378 cut down and necked down. 3400 plus fps with a 180 grain slug. Take that you 300 WSM fans.
Real new cartridges will feature no cases and electronic ignition, bores will be smooth and bullets will have fins. Our "new" ammo is about like our great grandfathers new ammo. Good ideas are persistent but a change is probably just around the corner.
