SSS.6.215 - Inert Haze Dreyse 30 and the Savage Model 10 PC .308
/Inert Haze Dreyse 30 on a Savage Model 10 .308 with 20-in Barrel
The Dreyse 30 is designed and manufactured by Inert Haze. It is a 30 caliber centerfire rifle silencer, intended to suppress many cartridges with projectiles appropriately sized to travel through the bore. It has a 1.61-inch diameter and is 8.19 inches long; the length does not increase with the included recessed direct-thread mount installed. Other mounting options are possible due to the rear of the silencer body being HUB compatible (1.375-24 tpi threading). The silencer is tubeless and constructed of fully-welded 6AL4V Titanium baffles that are coated with DLC. The silencer weighs 8.8 ounces, and the .625-24tpi threaded recessed direct-thread mount weighs 1 ounce, for a total system weight of 9.8 ounces, as tested. The Dreyse 30 can be obtained from Inert Haze Dealers.
Historical Note:
The Dreyse 30 silencer is named after Johann Nicolaus von Dreyse (1787–1867) who was a German inventor who developed the first bolt-action breech-loading rifle, known as the Dreyse Needle Gun or Zündnadelgewehr. Adopted by the Prussian army in 1841, it allowed for much higher rates of fire compared to traditional muzzle-loaders.
Silencer Hazard Map:
The predicted personnel hazards generated by the tested weapon system in this report, in the free field, are shown in the adjacent Silencer Hazard Map. Click or tap the Map to enlarge. Please reference Silencer Hazard Map Brief 8.1.12 for further details. The PEW-SOFT HD Blast Hazard Prediction Tool and Hazard Mapper is presented in Report 8.1.1.
Inert Haze Dreyse 30 20-in barrel .308 Bolt-Action Free Field Hazard Map Produced by PEW-SOFT HD Blast Hazard Prediction Tool using PEW Science Test Data
PEW Science is an independent private testing laboratory and also hosts the world’s only independent public suppressed small arms research cooperative. Testing, data analysis, and reporting is generated with funding provided by PEW Science members. Any test data that is generated with any portion of private funding contains this disclosure. The testing and analysis production for this Sound Signature Review was funded in part by PEW Science Project PEW-IH-126-001-25. Therefore, data pertaining to the Dreyse 30 in this Sound Signature Review is published with the express written permission of Inert Haze, LLC.
This review contains single test results using the Inert Haze Dreyse 30 with the direct-thread mount on the Savage Model 10 Precision Carbine rifle, chambered in .308WIN with a 20-inch barrel. Federal XM80 149gr ammunition was used in the test.
Section 6.215.1 contains the Inert Haze Dreyse 30 test results and analysis.
Section 6.215.2 contains Suppression Rating comparisons with selected .30 rifle silencers in the same size class.
Section 6.215.3 contains the review summary and PEW Science laboratory staff technical opinions.
Summary: When paired with the Savage M10 20” .308 and fired with Federal XM80, the Inert Haze Dreyse 30 with the IH direct-thread mount achieved a Suppression Rating™ of 48.2 in PEW Science testing.
As with all weapon systems, the user is encouraged to examine both muzzle and ear Suppression Ratings.
Relative Suppression Rating Performance is Summarized in SSS.7 - PEW Science Rankings
6.215.1 Inert Haze Dreyse 30 Sound Signature Test Results
A summary of the principal Silencer Sound Standard performance metrics of the Inert Haze Dreyse 30 is shown in Table 1. The data acquired 1.0 m (39.4 in) left of the muzzle is available for viewing to all. This is a members-only review and includes pressure and impulse waveforms measured at the shooter’s ear. PEW Science thanks you for your support; further testing, research, and development of PEW-SOFT and the Silencer Sound Standard is made possible by members like you!
Table 1. Inert Haze Dreyse 30 Sound Metric Summary
6.215.1.1 SOUND SIGNATURES AT THE MUZZLE
Real sound pressure histories acquired with PEW-SOFT™ are shown below. The waveforms are not averaged, decimated, or filtered. The data acquisition rate used in all PEW Science testing is 1.0 MS/s (1 MHz). The peaks, shape, and time phasing (when the peaks occur in relation to absolute time and to each other) of these raw waveforms are the most accurate of any firearm silencer testing publicly available. PEW-SOFT data is acquired by PEW Science independent testing; the industry leader in silencer sound research. For more information, please consult the Silencer Sound Standard.
The primary sound signature pressure histories for all 5 shots with the Inert Haze Dreyse 30 are shown in Figure 1a. The sound signatures of Shot 1, Shot 2, and Shot 3 are shown in Figure 1b, in early time. The real sound impulse (momentum transfer potential) histories from the same 5-shot test are shown in Figure 2a. In Figure 2b, a shorter timescale is shown comparing the impulse of Shot 1 to that of Shot 2 and Shot 3.
Fig 1a. Inert Haze Dreyse 30 Bolt Action Rifle Muzzle Sound Pressure Signature
Fig 1b. Inert Haze Dreyse 30 Bolt Action Rifle Muzzle Sound Pressure Signature, Short Time Window
Figure 2a. Inert Haze Dreyse 30 Bolt Action Rifle Muzzle Sound Impulse Signature
Figure 2b.Inert Haze Dreyse 30 Bolt Action Rifle Muzzle Sound Impulse Signature, Short Time Window
The Inert Haze Dreyse 30 is a full-size centerfire rifle silencer and classified as a conventional design in the PEW Science research taxonomy, although the internals of the silencer do possess venting in the first baffles and there is a vent array built-in to the included recessed direct thread mount. The baffle geometry consists of broad stepped cones; the first reflector mouth geometry is radially symmetric, with mill cuts used in the rest of the stack. The first expansion (blast) chamber of the Dreyse 30 has a circumferential ring along the inner wall to enhance turbulence generation upon mount vent array directional jet impingement.
The silencer is relatively lightweight (9.8 ounces with mount) especially for its size (8.2 inches with mount). The only tested .308 rifle silencer in the current research pedigree with comparable weight and length is the Off Grid Suppressors Trident Ti (6.165) at 8.8 ounces and 8 inches long. The Trident Ti is a 3D printed direct-thread model; it is outperformed in signature suppression by the Inert Haze Dreyse 30 on this host weapon system.
PEW Science Research Note 1: Despite the relatively conventional baffle geometry and short(er) length than some competing models, the Dreyse 30 produces high suppression performance. This is enhanced by its early vent structure in both the mount array and early baffles in the stack, directing initial jetting to the turbulence ring and relieving stagnation in the initial stage. The following observations are noted in the above test data:
Relatively long duration pressure blowdown presents at low peak amplitude (Fig. 1a).
Consistent internal combustion signatures are noted with defined coupled bullet shock and initial jetting components, followed by immediate jet throttle and pressure ramp beginning controlled blowdown (Fig. 1b).
First-round-pop (FRP) divergence begins after jet throttle and ends prior to post-FRP shot string peak accumulations (Fig. 1b and Fig. 2a).
All shot signatures have consistent initial coupled jet momentum with gradual post-jetting accumulation; post-FRP signatures possess gradual but minimal accumulation rate increases through the shot string (Fig. 2b).
PEW Science Research Note 2: Despite the early-time FRP divergence, the relative severity of the FRP signature from the Dreyse 30, to subsequent shots, is calculated to be low and on the order of three percent. This bystander observation may be inconsequential to many users.
PEW Science Research Note 3: This length class of 30 caliber rifle silencer represents an extremely competitive section of the market. As silencers eclipse the 8-in total length threshold, performance begins to greatly increase. Note there are outliers (some shorter silencers provide exemplary performance) but this general rule holds true. The reader is encouraged to use the Suppression Rating Parametric Visualization Tool (Members Only) in the Rankings to filter by length and weight and view the competition spatially. The Inert Haze Dreyse 30, at 8.2 inches long, provides the highest performance for that length (and shorter). Increasing the tested length threshold to 8.5 inches long results in the inclusion of silencers like the Diligent Defense Enticer L-Ti (6.67), CAT JL (6.147), and Dead Air Nomad-L (6.55). The Resilient Suppressors Jolene (6.137), Otter Creek Labs Hydrogen-L (6.81), Liberty Precision Machine Mach-L (6.163), and PTR VENT 1 (6.160), are all over 9 inches long. The tested configuration of the CGS Hyperion (6.27) is approximately 10 inches long.
To illustrate these comparisons further, please see Figure 5 and Figure 6 in Section 6.215.2 of this report.
PEW Science Research Note 4: The Omega Metric of the Dreyse 30 is relatively high; it is computed as 1.08 [1/Pa x 10] from the measured blast impulse signatures in Figure 2a, above. This places the silencer in Omega Zone 7, very close in external momentum transfer behavior to silencers like the Thunder Beast ULTRA 9 (6.24), though the Inert Haze Dreyse 30 outperforms the ULTRA 9 in signature suppression and is shorter than the ULTRA 9. It is likely that the early-time internal flow rates of the two silencers are different, given their internal designs. Please refer to the referenced research report for guidance. Omega metric technical details can be found in PEW Science Public Research Supplement 6.40.
As typically indicated, first-round sound signatures always differ from subsequent shots, as the atmosphere within the silencer changes. The FRP phenomenon cannot always be shown by viewing only the peak sound pressure. This is one of the reasons why The Silencer Sound Standard requires examining multiple sound signature metrics. Ammunition consistency can play a role in the determination of FRP, however, the close examination of measured pressure and impulse waveforms typically excludes ammunition from the possible factors influencing true FRP, due to the relative consistency of most high quality factory ammunition.
PEW Science has made a concerted effort to characterize the FRP phenomenon with true physiological human inner-ear response analyses. Additional PEW Science Member Research Supplements containing this information are released periodically.
The Inert Haze Dreyse 30 shooter’s ear suppression performance is examined in Section 6.215.1.2, below.
6.215.1.2 SOUND SIGNATURES AT SHOOTER’S EAR
Real sound pressure histories from the same 5-shot test of the Inert Haze Dreyse 30 acquired with PEW-SOFT at the shooter’s ear are shown below. Again, the waveforms are not averaged, decimated, or filtered. The data acquisition rate used in all PEW Science testing is 1.0 MS/s (1 MHz).
The primary sound signature pressure histories at the ear for all 5 shots are shown in Figure 3. The primary sound signature history is shown on the left. A zoomed-in timescale is displayed on the right, in the region of peak sound pressure for Shot 1 and Shot 2. The real sound impulse (momentum transfer potential) histories at the ear from the same 5-shot test are shown in Figure 4. Again, full and short timescales are shown.
Figure 3a. Inert Haze Dreyse 30 Bolt Action Rifle Ear Sound Pressure Signature
Figure 3b. Inert Haze Dreyse 30 Bolt Action Rifle Ear Sound Pressure Signature, Short Time Window
Figure 4a. Inert Haze Dreyse 30 Bolt Action Rifle Ear Sound Impulse Signature
Figure 4b. Inert Haze Dreyse 30 Bolt Action Rifle Ear Sound Impulse Signature, Short Time Window
The defined decoupling of the initial jet event from the primary blowdown signature observed in the muzzle signatures translates directly to the signatures measured at the operator’s head. In Figure 3b, the coupled bullet shock and pressure jet during the first shot is actually the highest amplitude pressure event during the entirety of the FRP signature at the shooter’s location. This is significant for a silencer of this type on this host; the subsequent jetting amplitude during FRP is kept lower than the Mach wave propagation at this location. This is one of the contributors to the relatively low FRP severity from the Dreyse 30, though it should be noted that the intensity to the shooter is approximately 30 percent greater than subsequent shots during FRP, on average, which is a higher relative severity than observed in the forward field to bystanders.
PEW Science Research Note 5: For the weapon operator in the free field, the Inert Haze Dreyse 30 produces similar risk with this weapon system to the long configuration of the PWS BDE 762 (6.121). It also produces comparable signatures to some of the silencers mentioned in Research Note 3.
The reader may examine the overall performance spectrum in the PEW Science Rankings Section. The reader is encouraged to use the Suppression Rating Parametric Visualization Tool in Section 7.2 below the table on that page to filter for length, weight, and other parameters.
As typical, the overall sound signature measured at the shooter’s ear possesses significantly less amplitude in both the pressure and impulse regimes than the signature measured at the muzzle (refer to Table 1). Furthermore, the application of both pressure and impulse at the shooter’s ear is delayed when compared to the pressure and impulse at the weapon muzzle. The combination of varying amplitude and rise time to peak amplitude influences the response of the human ear.
PEW Science Research Note 6: Elevated operator risk during FRP is minimal with this silencer, which may be important to operators using this system for hunting or other “single shot” engagements without hearing protection.
It is extremely important to note that muzzle signature influences the signature to the weapon operator. This is a test on a bolt-action rifle. Similar jetting phenomenon measured at the muzzle propagates toward the shooter. The standoff of the endcap to the shooter, as well as angle of incidence of the pressure (blast) waves, result in exponential decay of hearing damage risk when compared to personnel adjacent to the muzzle.
6.215.2 Relative Suppression Rating and Length Comparisons (.30 Rifle Silencers)
The Inert Haze Dreyse 30 suppressor is intended to offer competitive sound signature suppression across the pressure field, in a length shorter than the longest 30 caliber silencers, in a lightweight envelope.
Figure 5 and Figure 6 show supersonic suppression comparisons between selected 7.62mm (30 caliber) rifle silencers shown in public PEW Science Sound Signature Reviews, as of the date of this review publication. The results shown in Figure 5 and Figure 6 are calculated from real test data acquired with PEW-SOFT.
Figure 5 presents a performance comparison of the Inert Haze Dreyse 30 with silencers between 6 and 8.5 inches long, inclusive of mount. Figure 6 presents a performance comparison of the Dreyse 30 with silencers between greater than 8.5 inches long. Again, the presented length metrics are inclusive of mount, as tested.
The figures present the silencers in order of total tested system length.
Figure 5. Suppression Rating and Length Comparisons Of .308 Rifle Silencers Greater than or Equal to 6 inches and Less than 8.5 inches long Using PEW-SOFT Data and Analysis
Figure 6. Suppression Rating and Length Comparisons Of .308 Rifle Silencers greater Than 8.5 inches long Using PEW-SOFT Data and Analysis
As previously stated, the Inert Haze Dreyse 30, at 8.2 inches long, provides the highest performance for that length (or shorter). Increasing the tested length threshold to 8.5 inches long results in the inclusion of silencers like the Diligent Defense Enticer L-Ti (6.67), CAT JL (6.147), and Dead Air Nomad-L (6.55). The Resilient Suppressors Jolene (6.137), Otter Creek Labs Hydrogen-L (6.81), Liberty Precision Machine Mach-L (6.163), and PTR VENT 1 (6.160), are all over 9 inches long. The tested configuration of the CGS Hyperion (6.27) is approximately 10 inches long. In the two figures above, performance is presented of silencers with similar lengths as the Dreyse 30 silencer which outperforms notable competitor models, such as:
Thunder Beast ULTRA 9 (6.24) - 9 inches long
Rugged Surge, Long Configuration (6.22) - 9 inches long
Silencer Central Banish 30 Gold (6.69) - 8.2 inches long
At a weight of 9.8 ounces with its recessed specialty direct-thread mount, the Inert Haze Dreyse 30 outperforms all silencers in the same weight class. There are only five silencers that weigh 9.8 ounces or below in the current research:
Precision Armament TiTrex 30 (6.212) - 9.1 ounces
Off Grid Suppressors Trident Ti (6.165) - 8.8 ounces
Diligent Defense Enticer S-Ti (6.68) - 8.8 ounces
Dead Air Nomad-Ti (6.44) - 9.7 ounces
Yankee Hill Machine Resonator-K (6.32) - 9.5 ounces
The user is encouraged to be mindful of the degree to which sound signature suppression, and resulting personnel hazards, can vary across designs. Small arm weapon system suppression performance is a spectrum. The PEW Science Suppression Rating and the Silencer Sound Standard help quantify this spectrum for end users and industry, objectively.
6.215.3 Review Summary: Inert Haze Dreyse 30 on a Savage Model 10 .308 with 20-in Barrel
When paired with the Savage M10 20” .308 and fired with Federal XM80, the Inert Haze Dreyse 30 with the IH direct-thread mount achieved a Suppression Rating™ of 48.2 in PEW Science testing.
As with all weapon systems, the user is encouraged to examine both muzzle and ear Suppression Ratings.
PEW Science Laboratory Staff Opinion:
The Inert Haze Dreyse 30 is a full-size centerfire rifle silencer that possesses high performance for its length and weight. At 8.2 inches long and 9.8 ounces with its included specialty recessed direct-thread mount, the Dreyse 30 is extremely light weight. Its low relative first-round-pop severity and design envelope may be attractive to users fielding suppressed suppressed systems for hunting or other single-shot engagements. The HUB-compatible rear of the silencer allows the user to choose different silencer mounts, to their preference.
The Inert Haze Dreyse 30 is classified as a conventional design in the PEW Science research taxonomy, although the internals of the silencer do possess venting in the first baffles and there is a vent array built-in to the included recessed direct thread mount. The baffle geometry consists of broad stepped cones; the first reflector mouth geometry is radially symmetric, with mill cuts used in the rest of the stack. The first expansion (blast) chamber of the Dreyse 30 has a circumferential ring along the inner wall to enhance turbulence generation upon mount vent array directional jet impingement.
The silencer is relatively lightweight (9.8 ounces with mount), especially for its size (8.2 inches with mount). The only tested .308 rifle silencer in the current research pedigree with comparable weight and length is the Off Grid Suppressors Trident Ti at 8.8 ounces and 8 inches long. The Trident Ti is a 3D printed direct-thread model; it is outperformed in signature suppression by the Inert Haze Dreyse 30 on this host weapon system.
This length class of 30 caliber rifle silencer represents an extremely competitive section of the market. As silencers eclipse the 8-in total length threshold, performance begins to greatly increase. Note there are outliers (some shorter silencers provide exemplary performance) but this general rule holds true. The reader is encouraged to use the Suppression Rating Parametric Visualization Tool (Members Only) in the Rankings to filter by length and weight and view the competition spatially. The Inert Haze Dreyse 30, at 8.2 inches long, provides the highest performance for that length (and shorter). Increasing the tested length threshold to 8.5 inches long results in the inclusion of silencers like the Diligent Defense Enticer L-Ti, CAT JL, and Dead Air Nomad-L. The Resilient Suppressors Jolene, Otter Creek Labs Hydrogen-L, Liberty Precision Machine Mach-L, and PTR VENT 1, are all over 9 inches long. The tested configuration of the CGS Hyperion is approximately 10 inches long.
The silencer is relatively light and constructed of titanium. Though there are no barrel length restrictions listed by the manufacturer, the user is encouraged to contact the manufacturer for information requiring firing schedule limitations for desired use cases.
In this review, the Inert Haze Dreyse 30 performance metrics depend upon suppressing a supersonic centerfire rifle cartridge; no easy task. PEW Science encourages the reader to remain vigilant with regard to all supersonic centerfire rifle suppression claims. The gas volume and combustion products created by the firing of the supersonic .308WIN cartridge are significant; the measured pressure and impulse magnitudes, and their durations, illustrate this fact.
The hearing damage potential of supersonic centerfire rifle use is significant. PEW Science encourages the reader to consider the Suppression Rating when deciding on an appropriate silencer and host weapon combination for their desired use.
