W-W Seal-Tite wads
I was reading in my original Western ammunition Handbook about the then-fairly-new Seal-Tite wads. It said they were made of a composite substance that was waterproof, was able to be molded (as opposed to being cut, like the felt wads), and were designed with a concave on both sides to promote increased gas sealing.
The thought occurred to me that they didn't, of course, mention what the wads were made of. Does anyone today know? Was the composition of them ever published anywhere? Just curious, that's all.
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