the .577 Nitro Express to accept diameter bullets from the .600 Nitro Express. See also 13 mm caliber List of rifle cartridges References External links Ammo-One, ".577" Nitro Express", ammo-one.com , retrieved 14 September 2017. Cartridgecollector, "577 2" Nitro Express", cartridgecollector.net, retrieved 14 September 2017. Cartridgecollector, "577 3" Nitro Express", cartridgecollector.net, retrieved 14 September 2017. Cartridgecollector, "577 3" Nitro Express", cartridgecollector.net, retrieved 14 September 2017. British firearm cartridges Pistol and rifle cartridges Military cartridges