Interesting how the range of pressures from 5k to 7k psi is considered safe. Why not 6800 or 7200 for the high end? Will several thousand 8000 psi loads cause catastrophic failure? I shoot my grandpa's 1915 16 ga Flues a bit with moderate 3/4 and 7/8 oz loads (6500 to 8000 psi at around 1220 fps). He hunted pheasants all over the Midwest with it and I'm pretty sure he fed it a steady diet of heavy, high pressure loads. This is an area where one should be reasonable, whatever that means. I think large shot weights and high velocity are much harder on old guns than moderate to high pressures.
Regards,
Jeff

Last edited by JNW; 11/19/14 11:22 PM.
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Wesley