That breech plug won't ignite it 100 percent if I recall.
Taken from cva :
If you plan to use Blackhorn 209 powder I would highly recommend it a new plug.The Blackhorn 209 Breech Plug is specifically designed for CVA rifle owners that want to shoot any loose powder, not only Blackhron 209™. The plug has a hollowed out flash-hole that enables the loose powder granules to settle closer to the 209 ignition source. Whereas the CVA QRBP plug that comes standard with the rifle has a inch long pin-wide, flash-hole, making it tough to ignite loose powder evenly. Also, the QRBP’s flash hole will sometime get plugged by loose powder more easily than the Blackhorn plug, and you will find yourself constantly cleaning the flash-hole before each and every shot.