I have seen these shells at the local Gander Mountain, and have used their equivalent from Remington in a heavy #2 frame GH damascus 12 gauge. I would say at 1145 fps the pressure would be on the low side. Minimum wall thickness on the GH is around 50 thou so I am confident the gun can handle these loads, but I would hesitate to shoot anything much more potent because the gun is circa 1892.
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