Quote Originally Posted by dand38s View Post
Is there any actual study information on primer cup hardness. Every search that I have done tells you the cup thickness but not the hardness.

I have had a few slam fires using Winchester Small Rifle primers in my AR. They are seated correctly and deep enough but still having issues. The slam fire only occurs during the single load slow fire stages of high power. Never had a slam fire during the rapid fire strings even though I am still using the WSR primers. Also never had a slam fire with the Remington 7 1/2 primers on the single load strings. Just hate to condemn the WSR primers as I have a bunch of them.
Interesting timing as I ran across this FAQ on the white ok site today. Has a discussion on WSR primers

https://www.whiteoakarmament.com/resources/faq.html



Sent from my iPad using Tapatalk