Thread: Post firing case head expansion - what to expect?

Hi all
Just doing some load development for my 284 and been miking the case heads at the web. Getting about 0.09 to 0.12mm (.0035433" to 0.0047244") expansion after firing. No pressure signs when inspecting the primer so was wondering what is the normal expected range and when should I become alarmed? I guess the chamber dimensions will also have quite a bearing on expansion as well. Look forward to your considered advice and experience
Ruger7mm