Quote:
Originally Posted by lugerholsterrepair
Was there a specific time when the switch occurred from 7.65 x 21mm (.30 Luger) bottleneck cartridge to the 9 x 19mm Parabellum cartridge? Yes, almost immediately after George Luger invented it.
Was this transition across the board (did all manufacturers change simultaneously)? Yes, since there was only one manufacturer, DWM.
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The 7.65(.30 Luger) was in production till 1947, so there were no switch as such, but parallel production.