[CCI Primer Failure Mystery]

Thank you both. I was using a RCBS hand primer, and I just switched to a XL 650. Guess I need to apply a little more pressure on the up stroke. 

[CCI Primer Failure Mystery]

So I'm new here, and new to reloading so please be gentle . 

 

I have been reloading 40 s&w with CCI primers and have shot about 1000 rounds of with only 2 light strikes in my Glock with a lighter than factory striker spring. Meh.. 

 

But then I switched to 9mm for a friend, same primers and powder. Now firing from an M&P with factory springs and I'm getting 20% duds. The primers don't look like a light strike, they look well and truly struck. I can take those same "duds" and throw them in a Kahr and refiere them and they all go bang. No duds when firing the Kahr. 

 

Any ideas? Could the primers have gone bad?