Good article on the Gew-88, interesting he uses an Italian source when German sources are available.
It seem the author is learning as he goes along, based on all the articles.
The Germans and Americans played catch up with the French in regards to bullet design and ballistics.
The German sS 198 grain bullet of 1918, was a variation of the French Ball D.
“The calibration goes from 500 to 1800 steps (375 - 1350 m) with intervals of 100 steps (75 meters).”
From the net=
Although the Zollverein collapsed after the Austro-Prussian War of 1866, the metric system became the official system of measurement in the newly formed German Empire in 1872[13]:350 and of Austria in 1875.[80] The Zollpfund ceased to be legal in Germany after 1877.[81]
“Peculiar characteristic of this model (than did not come extended to no successive model) is the presence of metallic a tubular hand-guard with function of protection of the hands from the heat. The muff is in contact with the cane only to its extremities.
The gun is not supplied of some type of cut off and therefore it is not possible to load it manually while piastrina is inserted one.”
Germany, Gew 88; Belgium Mauser 1889 and Denmark, Krag 1889 all used barrel jackets.
For anyone who is serious about German rifles these two books are recommended.
The German Rifle By Walter, John (Book - 1979 ) 623.4425 Wal
This is the better book;
German Military Rifles and Machine Pistols, 1871-1945 By Gotz, Hans-Dieter (Book - 1990 ) 355.82 Got
This book goes into detail on rifling, ammunition, modifications, etc.