EDITED To incorporate: all feed and cargo properly through my press, apart from that S&B are sometimes very challenging to seat. The one dud primer I have ever experienced was an S&B LP. I think it was missing an anvil. Acquire seems to provide the loosest QC on cup form https://gunnerlauog.affiliatblogger.com/84031749/the-ultimate-guide-to-federal-large-pistol-primers-no-150