Daryl Wrote:

"Ctgs. of greater taper, like the .416 Rigby show pressure signs of bolt thrust/sticking long before better designed, straighter brass does, as the sloping case is less able to grip the chamber walls until pressure subsides, therefore they have and are only capable of lower working pressure limits. "

Do I ever agree with this! Found this fact to be very true when working with the Oehler M35 System testing the 416 Rem and a 416 cartridge of my design with straighter walls.