The gunk he calls "mud" looks to me like there's a lot of poorly sorted sand grade material and even coarser. A real clay-mud (like, for example might have been found around trenches in France) would be much more uniform and affect mechanisms differently. He needs to try to get a wee bit more scientific with these "tests"- describe the material accurately.
milsurpo
There was more to WW1 Pedology than just the certain French farmland areas on the Western Front.
https://en.wikipedia.org/wiki/List_of_military_engagements_of_World_War_I
Contents [hide]
1 Western Front
1.1 Battle of the Frontiers
2 Italian Campaign
3 Eastern Front
4 Romanian Campaign
5 Caucasus Campaign
6 Serbian Campaign
7 Gallipoli Campaign
8 Macedonian Front
9 Sinai and Palestine Campaign
10 Mesopotamian Campaign
11 African Campaign
12 Naval engagements
12.1 Atlantic Theatre
12.2 Mediterranean
12.3 Asia-Pacific Theatre
13 Air engagements
14 Contemporary wars
14.1 Pre-World War I
14.2 During World War I
14.3 Post-World War I
15 References
16 Sources
I once fell in the mud while carrying a hunting rifle. I was able to take it to a lake and swish the dirt on mud off it, but the mud rammed into the muzzle was more of a challenge.
A twig got most of it out, and then I pissed into the chamber end. That worked.



























