The Beaumont Rifle
 

I never knew this Dutch company existed until this morning, when I ran across an article about their M1871 11.3mm rifle, a very beautifully crafted weapon. Seems it started out as a single shot, black powder cartridge weapon which was later converted with an 4 round Italian magazine and smokeless cartridges. Not sure if it saw service in World War One, but that size of a round must have packed quite a thump!

David

Cartridges
 

The ballistic performance of the Beaumont cartridge was typical of its era and appears to be quite close to the American 45-70 Govt.
The British service rifle of the time was the Martini Henry 577/450 which was somewhat more powerful and was known to many as, 'The Recruit's Terror'. This was the rifle used in the Zulu wars.

David