Regarding the “?Fake?” CZO marked case. If “czo” (Lower case) is an actual, Post-1948 (not 45) Czechoslovak Socialist Republic headstamp factory ID, and also a Wartime German headstamp, then this cartridge is “Covert” rather than “Fake”. The Czechs produced a lot of Misleading headstamp 7,9mm ammo in the late 1940s early 50s for sale/aid to Hotspots around the world, usually with markings which simulated Late WW II markings of the former Nazi regime,
and in this case, just by luck/accident the wartime “czo” matched the Postwar “czo” existence of a different Czech code Factory.(or maybe not by happenstance).
Just a case of “Mis-identification,” rather than “Fakery”.
“Slanging Match”: Aussie for “Flaming” or “Disrespecting or Disparaging Comments” in an ongoing discussion. Sometimes it is purposeful, sometimes it (usually) arises from mutual misunderstandign of each others Language ( “They were divided by a common language”)
The “czo” case is an addition to my knowledge of “Covert” 7,9mm ammo of post-1948 period.
And also, “never say never” or “never say Always” with regards to production methods of cartridges. There will most often be an exception to the rule.
As to the M1894 Naval Maxim and the Gew88 primer blowout problem, My impression was that it was “more important” a problem in the MG, and that the Gew88 problemn was concurrent with the other “Blowup” problems of the then “new” Gew88, before the “Neue material” composition of the rifle, and the “Neue Art” design of the cartridge case.
Everything about smokeless small calibre cartridges was in a state of Flux with the introduction of smokeless Powder in the late 1880s-early 1890s…even Italy had “primer cup issues” with leaky Cups in the original M91 cartridge (Flat base, no crimp)…it resolved the matter by using a concentric circle “ditch” around the primer, which, on firing, was compressed by the Bolt face, and sealed the Cup in place. (The M91/95 Case).
Just goes to show that in Research of particular problems, one must be alive to the greater Picture, and venture into un-familiar areas outside one’s immediate collection interest. It’s just like Archeology…I regularly get requests from Archeologists about shell cases found in Middle-Eastern Digs, where WW I cartridge Cases are found together with or overlaying Crusader era coins etc. (Syria, Lebanon, etc.).