He ordered forseeable damage, he got it.
In fact, he got rather lucky if only the Einstecklauf was damaged, rather than the gun, which would have been far more expectable from the outset.
The makers of these muzzle-long insert barrels are very clear and very specific as to which insert cartridges are at all suitable, and which not. See the choice of calibers and the warnings on Keller & Simmann's website.
I could only think of two locking systems of a Drilling that would at all be thinkable for such a cartridge, and neither is common.
Carcano
