I'm not a fan of the design but I would test them to see what the effects of reloading will have on them when I get some.
(https://www.shellshocktechnologies.com/wp16/wp-content/uploads/2016/07/sst-techpage.png)
Video of 32 reloadings...
Problems I foresee, the seam, people who use chemical bath (Wet Tumbling) to clean, will corrosion setup? If yes that would lead to possible failures. It will be of interest to see how they hold up with respect to work hardening if any. Ejection rims can take a beating with reuse, need to observe how these will hold up over reuse...
Hope to find some to start testing...
I went to Shell Shock Technology's Facebook page and posted are you planning to make any other calibers soon.