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 stabilise the bullets. PMP (Pretoria Metal Pressings) is one of the very few ammunition manufacturers of 6mm Musgrave ammunition, but a lot of South African distributors have the ammunition in stock. A lot of international manufacturers (like Hornady, Nosler, Barnes, etc.) manufacture 6mm bullets for handloading.