On a 16 inch 44mag and a 9mm sig 226.
It worked ok on the sig, but large and heavy for a pistol silencer.
I bought it for large caliber rifles and it was great on the cheap Rossi.
Comfortable sound level with max load 44mag and very quiet with subsonic factory 44spl.
I tried a range of ammo I loaded and I was very pleased with the quietest handloaded ammo I tried.