Is that a Wolf with the speed breech plug? That would be a Wolf manufactured after 2010 I believe. If so, it should shoot black horn reliably. I am no expert like some on this forum, and having never had a hang fire with my wolf, I would suggest that you try the drill bit routine. If you drill out carbon in any amount it may have disrupted the flow of fire through the flame channel. I clean my plug with a drill bit after every range session with my wolf, and sometimes when I'm at the range shooting it to be sure the flame channel is clear.