Donnyfl

Very pleased with the Ronin on the Benjamin Bulldog....big reduction in the bark. I bought a db meter because I had to quantify the difference. I include a .22 Ruger Charger (10" BRL no suppression) for comparison as they're similar in loudness. These are averages of 5 shots at each distance. The 5' and 25' positions are at a 90 degree angle away from the shooter even with the muzzle. The 60' is directly in front and the 20' directly behind the shooter. Simply trying to get a feel for what was happening around me. Your mileage may vary. =)

No Mod Donny FL Ruger Hi Velocity Ruger CCI Quiet

5' 109.4 103.6 109.1 104.4

25' 97.6 93.3 104.1 98.7

60' 102.5 92.6 105.4 96.4

20' 95.1 89.9 103.2 94.2

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Not bad when considering a center fire PB is 160+ db. 

Regards,

Jim

I just put a Donnyfl Ronin on my FX Impact X .30cal with 700mm barrel

As stock I was getting reading of 92-93db with the Fx LDC. Using a Iphone app for readings

I put the Ronin and and was getting reading 90ish. Not really the sounds reduction I was hoping for.

So I started experimenting with the core wraps. I tried some open cell foam...no change.

I tried the material below, it is called spacer mesh. I did a full wrap and readings dropped to 89ish.

Hmm....my thought was the material wrap, felt, foam, and spacer mesh, is not allowing complete use of the volume of the cylinder. I also figure that there is little cancellation of pressure waves in the cylinder because of the full wrap.

So I tried the spacer mesh as show below. I am guessing that this causes three pressure waves in the cylinder and they "run into each other" and cause some cancellation of the waves. As show I am getting readings in the mid 84db. All readings taken next to the rifle on the bench. Rifle is shooting at full power.