I highly suspect a little factor known as WWII slowed the acceptance of the Star Crimp. Burrard definitely seems to imply it was introduced in England prior to the war in paper cases. It would also seem that pressure & velocity tests were run at this time & it was determined that normal velocities & pressures could be maintained with the ordinary 2˝" load put up in the 2 3/4" hull. The primary concern seems to have been that had the regular case length been maintained by using a suitable wad column the resulting shorter "Loaded" shells might be mistaken for 2" cases, which normally actually ran a bit longer than the nominal 2" after firing. I don't recall that Burrard actually mentioned who the originator of the Star Crimp was.
