Due to ammo unavailability or preference of non-factory chamberings Mannlicher-Schoenauers were rebarreled quite often, even before WW1. I have seen 1908s in 7x57 and 8x57, 1905s and 1910s in 8x57, 9x57, 9.3x57. Let alone the Holland & Holland conversions to their proprietary .400/375 Belted Nitro Express.