Comments by "" (@neutronalchemist3241) on "Project Ultra: Germany Wants a Stronger Compact Pistol" video.

  1. it's actually a 9mm Glisenti with a shortened case. So much that Fiocchi used the same load for its 9mm Police and 9mm Glisenti cartridges.
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  2. King Leonidas 5.56 NATO bullet diameter is 5.70mm. .22LR bullet diameter is 5.72mm. The difference obviously is in how much pressure there is behind the projectiles.
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  3. The shortened case is only required so that the gun will not chamber a 9mm Parabellum round by mistake. It has no relation with the load contained. Power-wise the 9mm Ultra round is in the same ballpark of the 9x20 mm Browning Long, the 9x18mm Makarov and 9x19mm Glisenti. The first two had been specifically designed to be the most powerful load usable in a blowback pistol without weight disadvantages, the third one came to the same result by chance (infact it had been designed for the breechlock Glisenti 1910, but it was then fired by the blowback Beretta 1915 too).
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  4. The reason is that this cartridge, like the 9mm Glisenti (power-wise they are practically the same cartridge) was exactly at the limit where blowback action became impractical. More powerful and, if you wanted to use a blowback action, the pistol became heavier than a breechlock action, top heavy and less durable. Less powerful, and breechlock actions were more complicate than blowbacks without advantages, but, exactly at this level, advantages and disadvantages of the two actions were even. Infact the 9mm glisenti started as a cartridge for the breechlock Glisenti 1910, and was then used in the blowback Beretta 1915 and 1922. The 9mm Ultra was developed to be used in a blowback (the Walther PP), but then the Germans decided that the PP frame was no up to the task (infact the Beretta in 9mm Glisenti had a buffer spring to avoid the frame to take a too hard beating) and developed a breechlock action for it. But, if you have to use a breechlock, you might as well use a 9mm Parabellum.
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