Agree with 3DM, Jeffery took back thrust considerations into account when developing the 404 Jeffery cartridge for the opened up standard length Mauser actions coming up with a rimless case shorter than the rimmed 450/400 case and a bullet larger in diameter than the 450/400 the ballistics of which he was wanting to duplicate while reducing back thrust for use in the opened up Mausers.

The issue of cartridge grip in the chamber perhaps calls into question the common practice of cleaning cases/cartridges to have nice shiny ammunition (to which I am guilty of) and also the development of nickel plated cases in factory ammunition and of course subsequent reloads based on these cases. One of the advantages promoted by ammunition manufacturers in respect of nickel plating is the inherent slipperyness of nickel plating aids feeding and extraction. While this slippery plating may help the general movement of cartridges and cases in the journey from the magazine and into the chamber, the definition of easing extraction presumably means easing grip on the chamber walls too.