I don’t know how people can even fire 454 Casulls. Talk about “tear your face offf” loud. I was once at a range and the fellow a few stalls down was firing one. I almost had to leave.
I had a guy touch off a .500 S&W 4” next to me at an indoor range.
My nuts about fell into my socks.
I used to have a Desert Eagle in .50AE (sold during my divorce). It’s gas operated, and the gas vents to the bottom and sides when the slide comes out of battery. It’s not particularly noticeable to the shooter (who has to worry about the occasional case that ejects into his face), but if you’re standing off to the side, the jet of flame will make you think the weapon may have blown up!