30 cal. moderator on a 22 gun, is this effective?

Hello In theory the 30 cal should be a little louder(if same size). I have a Donny fl Ronin in 25 cal and an Emperor in 30 cal on the same 22 cal gun they sound the same. In theory though the Emperor should be quieter (larger with more baffles and volume) but because it is a 30 cal bore the sound the same. Both are quiet enough but you have a lot of unnecessary weight and length with the 30 cal Emperor. Just my experience hope this helps Eric
 
The hole size in moderator makes a big difference, close to the pellet size the better BUT every in’s tolerance is. Little different and if off my a little clipping or inaccuracy will occur. That being said if the tolerance is good the. Smaller the hole quieter it is, I have swapped between 2 identical moderators with only difference being the caliper/hole size different back to back and the one that is caliber specific has lower noise report and lower tone. 


that being said the difference is only noticeable if you need be mouse fart quiet. 
 
This is a very little molehill that people blow up into Himalayan sized mountain.

There is a small difference, but without scientific instrumental documentation of the difference between the same platforms in different calibers, it is a matter of perception.

If you think your moderator does not make a difference, take it off a shoot a bare barrel a couple of times.

I do recognize that there is a difference in sound production between dry firing and shooting a pellet. Even going to a heavier pellet can make a big difference in sou.d output.
 
To answer your question..... there can be a very large diffence in noise level when running a "loose" moderator. That also does not mean there will be.

But I can say this for sure. Tight baffle clearance makes significanctly more turbulence. This equates to a more delayed expulsion of pressure.... basically equalling less noise.

This effect (or lack of) can be offset by volume. (internal capacity of moderator) Tighter baffles can get away with less volume, and more volume can get away with loose baffles.

That said, I prefer all of mine to be tight. I have a couple that are very compact, and also very effective.
 
If you put a .22 LR through a .45 acp suppressor and compare it to a .22 suppressor , there is no difference.

A powder burner forces the gases back down the barrel, and an airgun filters the pressure through felt and vent holes.

The important thing for both systems is to have a large enough chamber to contain the pressure.




 
I think that the size of the hole makes a difference on some moderators more than others. I use an STO Falx high flow for my Maverick, and I use that same moderator for .177, .22, and .30. It works great for all calibers in my case. Sure, the smallest hole possible should be the most effective, but it probably doesn't matter as much as many would think. Some moderator designs are much more prone to the size of that hole mattering, whereas others it makes almost no difference at all. By default, I usually get a moderator that is one size larger though. Anyone who as ever chased clipping or just accuracy related issues will understand why that is good advice :D
 
It makes no difference, I have a .25 Huggett Snipe on a .177, and it's silent.

I've put a .30 Donnyfl Shogun and a .25 Huggett Magna on a Daystate Wolverines. .25 there was no difference.

Makes no detectable difference. The inside of the can absorbs the noise before it gets to the hole...of course a smaller hole would be a little better...but the human ear would not be able to ell the difference. ....in my opinion.