my first shotgun was a pedretti hushpower, yup, was like swinging a drainpipe, but only ever used sub sonics in it, check out your local gun shop, to see if they keep the cartridges in stock, as some shops sell them as dear as £6-50 per box of 25
anyway, I never had the need to wear earplugs, it was that quite, on getting a semi auto, I couldent belive how much noise the hushpower had actually been suppressing,
they are good when you have permissions with noise issues, they may still sound noisey to you, but get someone to stand 30ft away, they will tell you how quite they are, Ive stil