I have a 25 WC MKIII compact and have it tuned to 45 fpe. The Donny FX on the WC is quieter than a unmoderated 25 Marauder. On hand are a Donny FX, Shogun and Ronin to trade between air guns. The Shogun seams to work best but I can't quantify it. With a cheap meter, shooting indoors at 17 yards...