"It was Chinese, imported mid to late 80's. I saw the packaging. Steel cased, copper coated cases, sealed both primer and case mouth. The owner of it bought it with his 9mm Norinco Tokarev (Yes, they made those, too) and we had shot some of it from said pistol just fine. I don't particularly care for your ad hominem attack re my veracity."
Entropy, I have no doubt that you believe you had Chinese CWS 9mmP in the US in the 1980s or '90s, but if you did it remains some of the rarest ammo ever imported. Nobody in the cartridge collecting community, including probably the most advanced and knowledgeable 9mmP collector in the world, has ever heard of it. If you have any remains of the ammo, or boxes, or pics, I would surely love to see them and add to the collected wisdom on 9mmP, but if not, I'll go with the experts and believe that you're just mistaken on the ammo materials or origin. And I'll continue to shoot lots of steel-cased 9mmP.