One place pressures can get high before brass starts to show signs is in a "balanced & blueprinted" action and chamber where everything is true, square, and minimum dimension.
One instance where this was apparent was when Layne Simpson used a Jarrett built rifle to develop 7mm STW loads for his article years ago. Pressure lab tests revealed how hot his stuff was when the cartridge was being subsequently standardized.
Last edited by mathman; 04/20/15.
