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Never been able to find that information, very rough scaling on the images suggests around 30cal but perhaps less. That fits fairly well with reported 716m/s MV. Various 22ish cal field howitzers seem to do about 500m/s, while the 50cal field guns did more like 800m/s. Of course much depends on the design of the ammunition and just what an acceptable gun life is judged to be. One can guess that the 17,000 yard range involved some kind of barrel eating supercharge.Thanks for that information Kadija Man
Never been able to find that information, very rough scaling on the images suggests around 30cal but perhaps less. That fits fairly well with reported 716m/s MV. Various 22ish cal field howitzers seem to do about 500m/s, while the 50cal field guns did more like 800m/s. Of course much depends on the design of the ammunition and just what an acceptable gun life is judged to be. One can guess that the 17,000 yard range involved some kind of barrel eating supercharge.
Thanks for that information Kadija Man
