Muzzleloader: Knight MK85 - 209 System: Knight 209 Conversion kit - Primers: Win 209, Fed 209A (Blue box) - Barrel/Bore/Chamber: Clear, empty, un-obstructed, not loaded. - Breech Plug: Totally CLEAN - Primer Holders: Knight red plastic. Dry Fire: The Fed 209A's perform fine, the Win 209's self destruct as the gold primer cup is blown backwards and out of its silver rim after impact by the firing pin. I've been halfway through a box of Win's and had 2 primers that actually worked. These are OLD but had same issue when they were new. Anybody familiar with this? The answer's probably posted here somewhere but just haven't found it yet. I use Win's very favorably in all cartridge setups. Thanks!