OK- what's the length of the ctg? Is it still 2.4"?

Here's a 2" verison, using belted brass, belt turned off, so only a .532" rim. In this instance, a .350 Rem mag case.

To the right of it, is a 9.3x57, which is 2.244" Overall case length.
Your case has some 26+ grains greater capacity.