Modern "hi-speed" .22 lr will be needed for most sub-caliber kits. Standard velocity ammo is not quite "hot" enough to function the toggle. At least that has been my experience.
The Germans elected to go with the longer barrel in the .22 kit to get just a little more velocity and better function from the kit. I believe this is explained in the Goertz and Sturgess book.
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03man(Don Voigt); Luger student and collector.
Looking for DWM side plate: 69 ; Dreyse 1907 pistol K.S. Gendarmerie
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