Again, things are not always black and white. Never used Fed 209A primers, so can't comment. However, tried CCIM 209s. They were dirty and less accurate FOR ME IN MY GUN. The are also too big for my original Knight and lehigh plugs (got stuck after the shot) And since I got my Lehigh conversion plug, I use standard Winchester W209 primers and my knight LRH with BH 209 goes bang every time. And they are smaller and don't get stuck in the primer pocket.

The one FACT I have learned about muzzleloading is that I can only say what has worked for me. Doesn't mean it will absolutely be the best thing for others and their guns, even if it is the same model.

But, I am in total agreement on one point: I hate crud rings!