The.700 Nitro Express, also known as.700 H&H, is a big-game rifle cartridge. The cartridge is typically charged with around 250 grains of powder, in addition to a two-grain igniter charge. The cartrid

The Nitro Express series of cartridges are used in large-bore hunting rifles, also known as elephant guns or express rifles, but later came to include smaller bore high velocity British cartridges.