Has me confused with someone else, I didn’t do the magazine article. In fact,I would like to see it too.
For whatever reason I prefer short actions. Highest velocity in a .25 wasn’t the goal for me. Highest velocity that a case will give with good accuracy is..
Handloader #307, April-May 2017
Wildcat Cartridges column titled
.257 Wildcat by Richard Mann
the Outdoor Hub article summarizes the HL article
For myself, I think the .25 Souper, or something combining the shoulder diameter( .462" ), and neck angle ( 30 degree) of the CM case design , with the .308 case length would suit the .25 caliber in a SA magazine quite nicely. No real need to sacrifice case length with .25 caliber bullets designed to work in the 10" twist.
I've gotta think that the SA .25-284 is the peak of that hill.
There is definitely something to be said about the benefits of starting with Lapua CM parent brass though.