This video takes a close look at the Daystate Air Ranger, FX Royale, Air Arms S410 FAC, Logun Solo, BSA Ultra, and Edgun Matador. After a look at the guns, we move on to a sound test, and finish off with a few conclusions re: the sound levels of the six rifles.
The Air Ranger was tuned to 45 foot pound of energy (fpe). The Edgun was at 33fpe. The Royale about 34-35fpe. The Logun was 29fpe. The AA was at about 31-32fpe. And the Ultra (.177) was at 15-16fpe.
I'd shut my camera down in between guns, and sometimes I wouldn't get the zoom in the same spot when I fired it back up. The microphone isn't a stereo telescopic (like some of the really fancy cameras), so the sound being recorded was the same despite the differing zoom.