Had to think a bit.. last purchase was either the Tisas dbl. stack 9mm Cmdr -sized pistol or the 5K SP primers I found on sale.
The Tisas has been a disappointment for me ( my ability to shoot it accurately) the primers were a great deal.
This was the 2nd time I bought these "manufacturers 2nds" primers, made in USA by ???
Not sure why they're 2nds, but I've been shooting a bunch of the 1st batch of 5K that I bought, and ALL have worked as they should.
All my shooting has been range days, for fun, load & accuracy testing, so if I get a bad primer, it's not a big deal.
My personal defense loads do not use these primers.. though they have been as reliable as any brand of primer I've used in the past.
I've tried most brands of primers anyone could name & can't remember having an issue with any of them.