Rolf, have you tried this one?
The Hornady 270 grain Spire Point.

https://www.grafs.com/retail/catalog/product/productId/6342

I have used them from a 375H&H on elk and large Western Mule deer. At a muzzle velocity of 2700 FPS they are more prone to break up when hits are between 10 and 100 yards than I'd like, but at the speeds you can get from the 9.5X56 Mann I bet they would do fine for game up to about 400 pounds, and any distance you can make a good hit.