Update: I loaded the NSI 688 in 20ga AA shells for a K-20 that has cratered firing pins.

This gun pierces every brand primer except W209. I'm running out of W209, and the gun is not going in for new pins until I can't find primers it won't pierce.

A rant about Krieghoff firing pins is not germane to this post... other than to say they can't make a firing pin to save their arsch.

The NSI primers do not pierce in said krautgun.

W209 is now $92/brick when they can be found. NSI is about 4.5 cents a cap, which while still absurd can be considered a bargain today.

I fully support this product and Winchester can kiss my shiny nickel plated floorplate.