v8r,
If you are handloading and continue to have a problem with the primers, try some small rifle primers. They have a harder cup and the energy is almost the same as a small pistol primer so you don't have to change your load. I use CCI 400's all the time in handgun and .357 Mag Handi loads. I use small pistol primers (CCI 500) in .38 Special, small rifle (CCI 400) in .357 Mag and small pistol magnum (CCI 550) in .360 DW that I shoot in the Handi. I get a little better accuracy with the CCI 550 in the .360 DW, otherwise I would use the CCI 400. I have never had a problem with S&W or Rugers firing the CCI 400.