I received my Tishina 150x350 for my Leshiy 2 .177 350 mm barrel today. I setup my CheckMate CM-140 sound meter and tested my stock Leshiy .177 250 mm barrel and Leshiy 2 in various configurations. The sound meter was setup 3 feet from the muzzle. Conditions: Temp = 67*, Humidity = 17%, Barometer = 29.75 inHg, Altitude = 7,126 ft, Back ground noise = 43.8 dBA.
Leshiy - average of 5 shots = 87.8 dBA
Leshiy 2 - average of 5 shots, no moderator = 95.0 dBA
Leshiy 2 - average of 5 shots, stock Moderator = 88.1 dBA
Leshiy 2 - average of 5 shots, Tanto = 89.3 dBA
Leshiy 2 - average of 5 shots, Tishina 150x350 = 87.4 dBA
I bought the Tishina because it allowed me to move my bipod farther forward and it looks "Kool". Added benefit, after the fact, is it is slightly less loud.
Still working on my trigger control but really liking my Leshiy 2! Below is a picture of my setup while testing with DonnyFL.