Hope you like tinnitus... Silencer Central says a Ruger 10/22 is aprox. 140db. Meanwhile 120bd is enough to cause instant damage and 85bd sustained is also enough to cause damage... Sure your longer barrels will bring that down a bit but nowhere near low enough to actually be hearing safe...
This is not correct. You are confusing constant, steady state noise with impulse noise and the two are very different. The OSHA limit for hearing damage from impulse noise is 140dB. Most long barrelled 22 rimfire rifles will approximate 140dB at the muzzle, which means they are 5-7dB less at the shooter's ear.
Sound tested according to MIL Std 1474 D, the firing pin drop on a rimfire rifle will run to 108dB.




















































