Bad primers ?????

[hammer111]

I was loading my 350 with Winchester small rifle primers. Had several primers that wouldn't go into the case and got smashed up.
I thought it was the cases, but when I felt that the primer wouldn't go I stopped tried another case same thing. Tried a different primer in the same case and it went in.
Has anyone else experienced this. Is it a anomaly, or does this happen a lot. It's my first experience.

 

[Dosh]

Had some 210Ms which were hard to seat in new Nosler brass. Checked pocket depth and the Sinclair uniforming tool did the trick, but I still think the 210Ms are a bit on the large size.

 

[RockyMtnMT]

We have recently been having WLRM primers that leak. These were purchased long ago. Have never had that problem until the last few trips to the range. Going to the range tomorrow, think I will grab a diff case of wlrm.