6mm Musgrave

The 6mm Musgrave was a rifle cartridge invented by Ben Musgrave and introduced by Musgrave in 1969
The cartridge's design was based on necking down the .[303 British], with the original intent of it being a Springbok caliber for hunting on open plains in South Africa's Karoo, Kalahari, and Namakwaland. It also served as a modern cartridge suitable for converting old Lee-Enfields with worn out.303 barrels.
Like the .243 Winchester, it has a fast rifle twist of 1-10 inches. However, if 105 grain bullets are used, it is recommended that a 1-9 or even faster twist is used to stabilize the bullets.
Few manufacturers specifically create 6mm Musgrave rounds, with PMP method.
Most bullet manufacturers offer 6mm bullets that are suitable for use with rifles chambered in 6mm Musgrave.