Mike, typically clickers will start showing themselves on the 2nd-3rd firings if it's a die/chamber mismatch. The die isn't creating enough clearance during the resizing operation. Small base dies can be the cure or having a custom made die that will size the base smaller. Or having a reamer dimensions changed at the .200 line. Seldom is chambering a round an issue......If you're having clickers on the first firing with virgin brass, it's pressure or a super tight cut chamber or something else. Which all will need to be addressed.