If I'll, your comprehending is incorrect. There isn't a these point a 'difficult' or 'tender' primers. Mil spec primers are magnum quality and less delicate on the firing pin hit. So my question is whether you should count on to see a really comparable pattern among the primers you examined https://winchester-41-small-rifle35677.blazingblog.com/31907696/the-best-side-of-federal-large-rifle-magnum-match-primers