CCI has been the mainstay of my reloading operation for decades. With the exception of using Federal GMMM 210M primers for my precision 308 loads, all 9 calibers I load for use CCI. About 2 years ago I started loading 38 Special for an old S&W Model 37 police gun. I was getting consistent failures to fire and figured it was the gun. I switched to Federal primers because I read that CCI tends to be a hard primer. I then loaded some 357 and 38 Special for a Dan Wessone Model 15 357 and had the same issue, some time later I encountered the same issue with another Dan Wesson Model 15. This week I had the same problem with a Taurus Model 85. I don't believe I have encountered problem with Ruger or Colt revolvers or semi auto handguns but the problem is consistent enough with enough of my revolvers that I am switching to Federal.