The .30 Carbine cartridge was a slightly modified .32 Winchester Self Loading, which was never a pistol cartridge.* (The similar .32-20 was a rimmed cartridge used in both rifles and revolvers, but the semi-rimmed .32 WSL was used only in the Model 1905 rifle.)
*The early .30 carbine ammo was even headstamped ".32 WSL".
Jim
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