Subsonic .375 Socom … Silent but Deadly
Jeff over at BigShooterist built a suppressed SBR and chambered it in .375 Socom. .375 Socom is the brainchild of Tony at Tromix. You may know Tony’s work on the Siamese AR-15.
Well the .375 Socom is a large caliber akin to the .450 and .50 caliber big bores where the casing is so large that a traditional 30rd AR mag becomes single stack.
Here is Jeff’s intro on the .375 Tromix.
Here is his second video where he talks a bit more in detail about the round.
It is interesting to hear that the .375 Socom sub sonic is 275 gr at 1000 fps. Not too far off from a .45acp at 230gr out of a 16″bbl going at 955 fps. However I am sure the .375 Socom has a better ballistic coefficient than .45 acp.
It sounds rather quiet with the Bowers pistol can.
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The .375 Socom is a necked down .458 Socom.
I don't understand why you would make it subsonic when you can load up 400, 500 and 600 gr bullets in the 458 Socom at subsonic speeds.
I guess you would get a bit of a ballistic advantage over lower BC bullets, but how much does that really count for at 1000fps?
That said, the 375 Socom is an AWESOME supersonic thumper for a small platform like the AR15.
If you want me to buy a ridiculous mega cartridge, the bullet should be fist shaped and have a depleted uranium core. Everything else falls short on the gee-whiz meter.