Tromix .375 SOCOM

    375 SOCOM

    Over at, 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 and read the thread.

    Richard Johnson

    An advocate of gun proliferation zones, Richard is a long time shooter, former cop and internet entrepreneur. Among the many places he calls home is