I fully support your plan to provide a selection guide.
Also would like your perspectives on how important it is to tailor the moderator to the caliber of the pellet, e.g., can a moderator designed for .25 caliber be nearly as effective as a smaller diameter moderator for .177 pellets?
And why not offer a moderator that extends back along the shroud as well as beyond the muzzle.
Regarding prioritization of your criteria... to me, I look for maximum quieting without disrupting group size. I don't mind POI drop as long as group sizes don't widen. And all else equal, I prefer a lower longer tone versus a higher frequency noise with any sort of crack.
As far as testing, I did a lot of comparisons of moderators on my Daystate Pulsar. But I also looked at sound measuring devices. I found that examining the time/intensity plot from a decibel recorder (like a Microtrack) gave guidance more in line with my ear than a simple sound meter that shows the max decibels (e.g., BAFX). The Pulasr with no moderator was fairly quiet. With a Falx it was whisper quiet at my shooter's ear. The decibel recorder showed a significant difference with vs without the moderator. But the simple max decibel meter only showed 1 dB quieter with the moderator; perhaps it was more sensitive to the action noise.
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