Re: Pressure Signs .223
In looking closer at those dimples in the primers, they're quite shallow. I think you should have your firing pin spring replaced or get a longer one. Measuring the strength of the springt you have then comparing that with specs will tell if its weakened too much. If the firing pin doesn't protrude at least .050" (or about .005" more than half the firing pin tip diameter) from the bolt face when it's full forward in the bolt, it's too short; they should protrude at least that much and .055" is better.