Too loud

I finally got to work on my nova liberty 22, I drill out the barrel port, added two more washer to the hammer spring and turn the regulator up half of turn. I put everything back together to test it out and it seems to be alot louder even with a moderate on. Is it just me or have someone have the same thing happened to them, I know with more power the gun get louder but it just seems to be too loud.