I talked to the people at Knight and Blackhorn. The people at night told me that the breech plugs in the LRH and Disc Extreme are too short to ignite BH209 and the Mountaineer and ultra light will ignite BH209 every time. They said it’s 50/50 chance any Disc extreme or LRH will fire it! The people at BH 209 were very kind and explained that the 209 primer spacing is too loose in those model Knights and are sending me some O-rings that they had made for CVA’s that might work. They are sending them at no charge and talked to me for longer than they needed to’! So I was impressed by them. The same guy at Knight told me a few weeks ago to back out the breech plug a quarter turn and both guns would fire the BH209! Then while I’m at the range after several attempts with both guns and not one shot fired but many primers! He said yeah it’s a 50/50 chance! I orders Leigh defense breech plugs for both guns and will try one more time before going back to Triple 7! Couldn’t believe after reading so many comments and stores about Disc extremes and LRH shootings BH209 so great and my luck I couldn’t get either one haha! Well live and learn! New isn’t always better I guess! BH209 guy said they have powder that’s 13 years old that fires every time so at least I can use these cans I have with a future gun! He also said without hesitation T/C shoots the powder the best! thanks for your reply’s guys