So I've been trying to test and quantify as many different moderator designs as I can. You can see the results here:
https://www.airgunnation.com/topic/fx-crown-bespoke-moderator-tesla-gas-diode/page/5/#post-453278
One somewhat counter-intuitive thing I've discovered is that larger diameter tubes actually have a tendency to make sound attenuation more challenging in regard to cutting that initial peak or "uncorking sound." This appears to hold true, not just on my .22, but also on my big 80 foot pound .30 cal Crown.
Because of this effect though, the Tatsu might not be your best option for sound suppression. The Tatsu very likely would be out-performed by the Tanto on your gun as it is both longer and smaller diameter. If you're having clipping issues, it is very likely you have muzzle concentricity issues as well, so going with something even longer like the Koi or 0DB may solve one issue but create another.
As an aside, I've struggled mightily both to figure out why large diameter moderators tend to be louder, and to make one which is quieter. Thus far I've met with failure, to the extent where I'm not only losing what few hairs I have left over the subject, I'm starting to question my sanity. After all, how could a design so much physically larger not be as quiet as or quieter than an otherwise almost identical one of smaller diameter? I don't have the answers yet, but I just completed another round of testing today so hopefully I'm getting there..... *shrug* It really is a very strange problem.
Anyway I hope something in all that was useful. If you have any questions I'll do my best to answer them, but for now my best advice is to try a different mod because you may not have a setup well optimized for silence, particularly if you're putting that Tatsu on top of your gun's shroud.
So I've been trying to test and quantify as many different moderator designs as I can. You can see the results here:
https://www.airgunnation.com/topic/fx-crown-bespoke-moderator-tesla-gas-diode/page/5/#post-453278
One somewhat counter-intuitive thing I've discovered is that larger diameter tubes actually have a tendency to make sound attenuation more challenging in regard to cutting that initial peak or "uncorking sound." This appears to hold true, not just on my .22, but also on my big 80 foot pound .30 cal Crown.
Because of this effect though, the Tatsu might not be your best option for sound suppression. The Tatsu very likely would be out-performed by the Tanto on your gun as it is both longer and smaller diameter. If you're having clipping issues, it is very likely you have muzzle concentricity issues as well, so going with something even longer like the Koi or 0DB may solve one issue but create another.
As an aside, I've struggled mightily both to figure out why large diameter moderators tend to be louder, and to make one which is quieter. Thus far I've met with failure, to the extent where I'm not only losing what few hairs I have left over the subject, I'm starting to question my sanity. After all, how could a design so much physically larger not be as quiet as or quieter than an otherwise almost identical one of smaller diameter? I don't have the answers yet, but I just completed another round of testing today so hopefully I'm getting there..... *shrug* It really is a very strange problem.
Anyway I hope something in all that was useful. If you have any questions I'll do my best to answer them, but for now my best advice is to try a different mod because you may not have a setup well optimized for silence, particularly if you're putting that Tatsu on top of your gun's shroud.
^^^^ this mirrors my finding too^^^^
a longer thinner mod works better than a shorter fatter mod and in most cases works better than a longer fatter mod. 36mm is the maximum Dia I make mine, 32mm most often.
A simple test to see if the noise is coming from the moderator or action Cover the gun with pillows allowing only the muzzle exposed, take a shot, if is goes bang the mod is not doing what it should. Confirm this by pushing the muzzle deep into the pillow with the gun exposed and take a shot, now you should only hear the action noise.
Bb
That said, this does bring up another good point which is quantifying the action sound explicitly. Not just the sound of the hammer slap per se, but also the sound of the pellet slipping down the barrel, and the air tensioning the mod/shroud, and so on. I should really do this, as it'll provide a performance-floor at the very least. Given how much sound exits the muzzle though, even with the best designs, it'd be hard to imagine that the action sound even on my relatively well tuned Crowns would compete. Maybe on a louder-slappier gun though. 
The Ronin and Shogun are basically the same effectiveness just your preference if you want it with a medium OD and long or big OD and shorter. If you really want to get really good feedback on sound ask professional tuners like Ernest, SPAW and Utah airguns, these guys tune guns everyday and they're honest with you if you will need a small tanto or even the Emperor with optional extender. They don't use any fancy db meters, all they use is their trust worthy hearing. 