Interesting photos and information PM66. As obvious in the photo the overall length of the 400gr DWM cartridge is quite out of spec compared with the those with the normal 347gr bullet which is unusual for a factory cartridge to do. Acceptable to drop down in bullet weight and have a shorter cartridge OAL but to go up in COAL is strange. Do you think that there is any possibility that the DWM round with the 400gr bullet is a reload? The purple primer sealant does not look factory as there appears to be no sealant on the primer itself. The sealant looks to be just around the rim of the primer pocket possibly remaining from an earlier initial firing?

I had what I thought to be a factory loaded 10.68x68 cartridge, Norma case with black primer sealant untouched around the rim and primer edge. The bullet was a hollow point affair and crimped into the case. Curiosity got the better of me as I wanted to see just what weight the bullet was so I pulled it and discovered the case was indeed an unfired Norma case with a berdan primer but it contained no powder. The bullet weighed out at 285gr and is RWS branded on the base. The hollow looks to be factory formed i.e. not a drilled out plain soft nose bullet bullet. In the the photos below, the copper coloured bullet is the 285gr and the nickel coloured a flat nosed a 347gr RWS.

I think I actually brought this cartridge back from my time in Germany as I have had it for many years thinking it was a fully loaded factory round. I note that Woodleigh advertise in all their old and new catalogues, bullets for the 10.75x68 are 347grs whereas they supply a true 350gr weight bullet for the .404. I suspect the cannelures are placed differently on these two close 10.75 bullets to allow for correct COAL in the intended cartridges.