I am trying to sort out a problem with 38 Special reloads in a new Colt King Cobra. Intermittent light primer strikes. Maybe 3-6 rounds every 100. Reloads fire 100% in my Smith’s. I typically clean my brass with the spent primer in. Primer sample has primer seated about flush. Gun has been back to Colt twice and notes on first slip say they repaired endshake. No notes on 2nd slip. I have never fired factory rounds through it but will buy some today. Are CCI primers “hard”?