For Research & Developement purposes, we turn to the University of Applied Science-Osnabrück-Germany and the R&D team, lead by Prof. Dr. Schmidt. This same R&D team had proved instrumental in the further developement of our Roedale Muzzlebrakes and are our first port of call for Scientific- Technological support.
Delta Series Moderators where extensively tested and evaluated along side every type of Moderator that we could aquire.
Firstly tests where performed on a large number of Moderators from several manufacturer's. ( in all 28 models) in order to assertain a basic level of comparative performance. Further testing and evaluation was performed only the models achieving enough sound suppression to fall within the EU Health & Safety maximum exposure guidelines. That narrowed the field to 15 models from 11 different manufacturers plus the Delta Series and a Theory Test Model built to test baffle geometry.
Delta Moderators where tested with blast baffle units 1 through to 7 installed just to verify the ammont of sound reduction achieved by the addition of each segment.
The first test phase at the start of the R&D project was carried out with the original Delta design.
The final tests where performed with the further developed version of the Delta Series Moderator.which is now the current production model
The peak noise level (dB) measurement was carried out in accordance with accepted international standards, using the latest technology in sound test equipment. (Bruel&Kjær 3160-A4/2 amplifier attached to a specialisedBruel&Kjær 4941 Microphone and coupled to a laptop using PULSE Labshop version 13.5.0.32 Sofware) The recoil reduction capability was tested by University engineers using the same equipment employed during our Muzzlebrake testing. ( University manufactured recoil testing aparatus fitted with Piezoelectric force sensors)
Tests on all Suppressors where carried out under exactly the same conditions and conform to Internationaly Recognised Standards. Tests where carried out using the same rifle and ammunition with and without the Moderator attached.
Test Rifle
Model: Howa 1500
Cal: .308 Win
Barrel Length: 22“
Ammunition: Magtec 150g FMJ Boattail
Additional testing with several types of .308 Winchester Ammunition ( Lapua Subsonic and Hornady Light Magnum) as well as a range of other calibers was also performed on the Delta Series Moderators, the results proved to be very very satisfying All Rifles tested with Delta Series Moderators that where fitted with 4 or more baffles comply with the latest personal exposure limit set by the European Directive 2003/10/EC ( 140 Pa tai 173 dB (C)) as well as the German Ministry of Justice regulations for health and safety, noise pollution & vibration emmissions.
Following is a list of some of the calibers we have tested to date:
.22 lr
.223 Rem ( Also in Semi Auto modus from a H&K MR223 )
.243 Win
.260Rem
6.5x284
6.5x68
30-06
.300 Win Mag
.338 Win Mag
8x57
8x68
9.3x62
9.3 RSM
.338 Lapua
.375 H&H
.450 Marlin
.458 Win Mag
.416 Rigby