Going back to your testing of your.380 Lehigh and Inceptor ARX. Because of the low weight of the ARX there isn’t enough weight to cycle in a pistol with a closed breech. They only work in direct blowback pistols. They work in my LCP2 just fine. Will not cycle in a Glock 32 or a S&W EZ. Hope this is of some help. Recently bought a Tisas Fatih 13 which has a 3.9 inch barrel. I watched reviews of the Tisas using.380 ARX Inceptors and work fine. An added benefit of the ARX its profile is that of ball rounds eliminating finicky guns that experience feeding problems with hollow points. I hope you find this useful.
Fantastic velocity! This would be a great 357 load for deep penetration. Yeah, that box isnt too user friendly. At over a $1 per round they should be able to throw in a real normal type pistol cartridge box