Over at 458socomforums.com, Tony Rumore of Tromix Lead Delivery Systems started a thread showing his new .375 SOCOM round. Cases are formed from 458 SOCOM cases run through a 375 SOCOM sizing die (custom die.)
Rumore reports getting a 200 grain Sierra FP to more than 2,600 fps using 55 grains of AA2520 powder and a 20″ barrel.
It appears Rumore is gauging interest in the new cartridge for the purposes of running a batch of barrels. If you are interested in reading more about the cartridge or seeing more photos, head over to 458socomforums.com and read the thread.