All the other battle rifles of the period cocked on closing.
I've never been able to figure out any advantage, not that I've
really given it that much thought. Easier to close the bolt, but
that's not such a big deal whereas the chance of it snapping shut
while out of the rifle would seem to be a drawback, especially
in war time. Hopefully it wasn't merely to be different. Was it
a way to not pay Mauser royalties which they never did.
I'm all ears.