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EE, where abouts did you find the information on what pressure it ran? I couldn't find it, but I'm interested at what it would be all the same. Surely it would be less than the 50 BMG, and that worked fine in the tropics. As a sporting round at 2650 fps? Ouch comes to mind in anything light enough to carry in the bush. Be effective though
G'day,
It's a SWAG based on performance, projectile weight and a guesstimating of case volume.
The aircraft weapons could often operate at higher pressures because their operating environment was at higher altitudes, so cooler ambient temperatures.
The tank rounds however, may have been a different spec.
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