The deep concave fire channel of this high-performance breech plug is designed to position the ignition flame directly at the Pyrodex Pellet or loose powder, ensuring a swift and reliable ignition every time. To achieve optimal performance, it's necessary to use this with the Thunder Nipples, specially crafted to complement the Thunder Dome Breech Plug. This product is compatible with bolt-action and in-line muzzleloaders, featuring M8x1 threads for a secure and precise fit. However, please note that it cannot be used with Pursuit or Yukon Models. Elevate your shooting experience with this expertly designed breech plug, engineered for maximum efficiency and reliability in the field.