Lyalvale Express Supreme Game Shotgun Cartridge Review 

Hello again. The Powder is either the C7V or the PSB05, both manufactured by Nobel Sport (Vectan). There used to be older PSB and CSB powders which were manufactured by MAXAM. Since the acquisition of MAXAM by Nobel Sport, the CSB powders have been discontinued and the new PSB powders manufactured by Nobel Sport changed to a new look similar to the C7 series. Really impossible to distinguish the C7s from the new PSBs just by appearance.

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I'm not a fan of these cartridges. Being 2 1/2" and marketed as being for game shooting, I used them in my English SxS. The recoil is so severe that it made me flinch. I would not recommend them.