Although DWM was formed from the corporate re-organisation of Ludwig Loewe, a couple of Banks, and the stock holding in several Arms and ammunition makers (such as FN, Mauser Oberndorf, Deutsche Metallpatronenfabrik Karlsruhe, (Vorm. Lorenz) etc, )
many of the constituents retained their own Corporate identities, and traded on the goodwill of the name/s, especially for export.
DWM did Integrate all its Ammo facilities by the time WW I began, but the markings in a lot of cases still reflected the older corporate origins, especially for Export customers, so “DM” still appears on a lot of ammo and clips made from 1897 to 1914. It was only in the 1920s, that markings of “DWM” became universal on the products of the now re-organised DWM (under the B-IWK banner).
Yes, by 1913, many 7mm nations in Latin America had adopted the “Lighter” spitzer bullet, so naturally, the Heavier (175grain) RNFMJ became the “S” (schweres) or heavy version; Spain, itself, only adopted the pointed bullet after WW II, having used the RN right thru the SCW.
Regards, Doc AV