I'll post a picture of the two different breech plugs tomorrow. With the blackhorn in my CVA with factory breech plug, only 1 out of five rounds would fire. The ones that didn't would just spit out the barrel from the primer charge. I could literally go pick up the bullet 10 ft away. It wasn't until after two trips to the range that I discovered with my Google fu that blackhorn didn't work and there was an aftermarket breech plug available.

New breech plug has given me 100% reliability with blackhorn and very good accuracy.