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Yeah Nah, I am using them with no issues. used to use them by the thousand when pistol shooting and they came silver coloured. I heard there was an issue a few years back but I am using them again...

How many firings have you put onto that Lapua SP Creedmoor brass Wingman. Is it the stuff you got from me?

Couple of other things to consider, how strong is your primer strike from your firing pin.
What type of powder are you going to burn.
Some firing pins fall lightly such as the standard Tikka, so...