You’re certainly right on the technical specifications and ballistic comparisons of 300 bLK to 7.62, .45 ACP, et al.
Except many shooters do enjoy this round because it provides unique advantages, like the ability to swap from supersonic to subsonic and suppressed with nothing more than a magazine change. Most would agree a cartridge with the ballistic performance of .45 ACP and the stability, accuracy, and increased range of the AR platform far out-performs any other sub-gun or pistol configuration.
It’s also important to remember 300 BLK was developed specifically for US special operations. It doesn’t translate into much practical use in the civilian world, but it’s a wickedly fun (and still potent) cartridge nonetheless.
Indeed? A pistol /subsonic set up for heavies can interchange with high(er) velocity supersonic loads?
Are not the pistol length subsonic ports incompatible with high(er) pressure supersonic loads without function issue? Hmmm. Didn’t know that. Confirm?