The Bushmaster in most of its factory configurations is a broadside cartridge, the 45-70 at inception and even better today, is an ass to front, front to ass cartridge.
The Bushmaster could be more than the improvised pistol bulleted rifle cartridge it is, but the world is rife with the "need" for concepts manufacturers need to sell.
Seen both in action and the 45-70 covers way more ground and cheaper for a handloader.
