Hard winspp ftf

As anyone seen this. Winspp used in loading 9mm back in 2017. The primer i am showing in pic I tried to fire in a ppq 3 times and the Stryker just scratched the surface of it. It almost rang when i tried to fire it in ppq. I then used my cz75 and it fired as normal but it is clear that it shows a lot less of indent from firing. Neither gun has ever failed and all the other rounds were good. I think these primers date back to 2015 or earlier and I have loaded maybe 2000 out of them with no issues.

 

Maybe that primer pocket is deeper? Maybe you got a small rifle primer mixed in somehow. Maybe not you but, before you ?

 

It could be the seating depth. I try to keep mine between .002-005 but had some as deep as .010 and still fired. Maybe a combination of light strike and to deep.

 

Primers must be fully seated into the pocket to go off reliably, no matter the depth of the pocket.

 

I looked closer and all primers were seated correctly. Was all same brass while not the best brass was the same headstamp. Just seems like a very hard primer cup, maybe sr snuck in at factory. Never used sr in pistol so unsure there.

 

Just a guess but maybe the sheet material is thicker and got past qc.

 

I've had pistol pockets that were deep enough a primer was .008 below in 44 mag. They all work for me but I don't care for that variation.