I like John H's analysis.
Perhaps we are on a cusp and don't have the technology to make things like this cartridge functional (perhaps multifunctional would be more appropriate)?
Think where our military arms would be if there were powders other than rifleite available for the 6mm Lee Navy in the early 1890's! Or if the Krag had only added more locking lugs for the new 30 Army? In both examples 1 technology preceded another by enough time to render them obsolete. Perhaps there is going to be a shift in bullet design or jacket tech that will make this rapid rpm the bee's knees?
I enjoy these discussions, they really add to my thinking of firearm evolution.
Sent from my Pixel 5 using Tapatalk