I believe BH209 was developed using the Encore/Omega breech plug for testing. So I don't think you can do better, meaning what you have is a "BH209 breech plug." They did make a few types of breech plugs for the Encore in the early days, maybe post a pic.

In any case, looks like you have a killing load. If you want, experiment with maybe some Speer 240 gr bullets.

Good shooting!