how quiet would you say the can is? I know its not the movie type "whisper" but what would it be comparable to? I want to get one but only if its really worth it. I hear some guys say its still pretty loud. how far away would you have to be to not hear the gun shoot (educated guess would be fine)? ive also heard that if youre shooting out in the open you wouldn't need ear protection but if your shooting under a covered area then you would still need ear protection. ive heard a can on a 10/22 and all I could hear was the bolt with subsonic ammo. they don't make subsonic for .223 do they? sorry lots of questions but im very interested.