...I suspect it’s pretty dang loud...
This.
SAAMI pressure for the .30 Super Carry is 45,000 psi. The .30 Carbine operates at 40,000 psi. That has the reputation of having a particularly nasty muzzle blast out of a 7 1/2" Ruger Blackhawk. Uncorking 45,000 psi from a 3" barrel? No thanks.
That's not based on pure speculation, either. On these rainy spring days I go to a local indoor range where most folks shoot 9mm, which at 35,000 psi is pretty blasty to begin with. One day a guy in the lane next to me was shooting something REALLY loud. Even wearing ear plugs and ear muffs it was bloody obnoxious. Guess what he was using? (Hint, its initials are 30SC).
