Technically it's Steyr from Austria. The Rumanian and Dutch Mannlicher 1892 and 1895 model rifles respectively. It's Gew88 type (Schlegelmilch) bolt with a Mannlicher clip-loading magazine, and when it was later coupled with rimless ammo in the Schonauer spool magazine, eventually became the famous Mannlicher Schonauer rifle.
If you intend to find information about reloading for it, your best bet is to look for information about 6.5x53R Dutch, as most reloading dies are labelled for that cartridge. The clips are the same between all models. Here in the USA, as I recall, most people make ammo from .30-40 Krag or .303 British casings.
WDM Bell, the famous elephant hunter, loved the 6.5 for penetrative power, low recoil, low noise, and good accuracy.