That's what I get from trying to give details from memory. I had two packages of primers: Winchester WSP and Federal #100.
The FTF was a brass colored cup, so I guess that was Winchester.
So maybe my striker channel wasn't gummed up after all, just typical Winchester performance?
There's a fundamental flaw in a system that passes laws that put an onerous burden on law-abiding citizens, but fails to prosecute the criminals who break those laws.