Pistol cups versus gas checks

[ciPeterF]

I have a box of 500 44 "Pistol Cups" from Hornady, they look like a gas check, but they are 1/4" high.. Anybody know how\what to do with them?

[kir_kenix]

half jackets maybe? made to be swaged with an exposed lead nose...that would be my first guess anyway.

[ciPeterF]

Thanks for the magic search words!! .. found this w w w.corbins.com/design.htm which explains it all..