Sergei Aleksandrovich Buturlin (1872-1938) was a Russian Ornithologist who also published extensively on hunting and sporting arms, including Drobovoe Ruzhże IstrelżBa Iz Nego (The Shotgun and Shooting It) in 1929. No English version of the several editions exists.
Robertovich graciously translated his 1938 edition
http://rutracker.org/forum/viewtopic.php?t=3524270

The original

[Linked Image from photos.smugmug.com]

I had to screen shot the chart from the Word doc as it didn't format to the Forum from my website

[Linked Image from photos.smugmug.com]

One analysis showed Krupp Spezial to have .61% carbon

https://sites.google.com/a/damascusknowledge.com/www/home