Description
IMR 4166 Enduron is a medium burn rate rifle powder, ideal for a diverse range of calibers, offering exceptional versatility akin to other propellants in the IMR series. It excels in cartridges such as .308 Winchester, .30-06 Springfield, and other mid-size rifle cartridges, making it a preferred choice among competitive shooters and hunting enthusiasts. The extruded formulation of 4166 Enduron enhances its metering properties, ensuring consistent powder charge weights and reliable ballistic performance. Notably, this powder features incorporated copper fouling eliminator technology, resulting in reduced fouling and maintenance. With its composition, IMR 4166 Enduron provides remarkable temperature stability, maintaining reliable performance across a wide range of environmental conditions, thus giving seasoned reloaders confidence in developing loads. Its primary advantage for handloaders is its flexibility, allowing for precise adjustments based on specific shooting needs. As reloaders seek consistency and accuracy, 4166 Enduron meets these requirements, bolstered by IMR's strong reputation for quality and reliability within the handloading community.
Specifications
Burn Rate
4.2 (Medium)
Bulk Density
0.929 g/cm³
Density
1.580 g/cm³
Temperature Sensitivity
Low
Suitable Substitutes
Powders with a similar burn rate that may be suitable alternatives (also see burn rate chart):
Standard Loads — IMR 4166 Enduron
Verified load data combinations using IMR 4166 Enduron.
.22 ARC (bolt action)
Sierra .224 | 90gr | Sierra HPBT MatchKinging 90gr
.22 Creedmoor
A-Square .224 | 72gr | A-Square e 72gr
.22 Creedmoor
Armscor .224 | 62gr | Armscor FMJ BT 62gr
.22 Creedmoor
Barnes .224 | 55gr | Barnes RRLP 55gr
.22 Creedmoor
Barnes .224 | 55gr | Barnes MPG FB 55gr
.22 Creedmoor
Barnes .224 | 55gr | Barnes TSX BT 55gr
.22 Creedmoor
Barnes .224 | 55gr | Barnes TTSX BT 55gr
.22 Creedmoor
Barnes .224 | 62gr | Barnes TAC-X 62gr
.22 Creedmoor
Barnes .224 | 62gr | Barnes TSX BT 62gr
.22 Creedmoor
Barnes .224 | 62gr | Barnes TTSX BT 62gr
.22 Creedmoor
Barnes .224 | 65gr | Barnes LRX BT 65gr
.22 Creedmoor
Barnes .224 | 69gr | Barnes Match Burner BT 69gr
.22 Creedmoor
Barnes .224 | 70gr | Barnes TAC-X 70gr
.22 Creedmoor
Barnes .224 | 70gr | Barnes TSX BT 70gr
.22 Creedmoor
Barnes .224 | 77gr | Barnes Match Burner BT 77gr
.22 Creedmoor
Barnes .224 | 77gr | Barnes LRX BT 77gr
.22 Creedmoor
Barnes .224 | 78gr | Barnes TSX BT 78gr
.22 Creedmoor
Barnes .224 | 85gr | Barnes Match Burner 85gr
Subsonic Loads — IMR 4166 Enduron
Verified subsonic load data combinations using IMR 4166 Enduron.
.30-06 Spring.
Berger .308 | 230gr | Berger Hybrid Target 230gr
.30-06 Spring.
Berger .308 | 230gr | Berger Hybrid OTM Tactical 230gr
.30-06 Spring.
Discreet Ballistics .308 | 188gr | Discreet Ballistics Selous Machined Expander 188gr
.30-06 Spring.
Hornady .308 | 175gr | Hornady Sub-X 175gr
.30-06 Spring.
Hornady .308 | 190gr | Hornady Sub-X 190gr
.30-06 Spring.
Lapua .308 | 200gr | Lapua Subsonic 200gr
.30-06 Spring.
MAKER .308 | 200gr | MAKER 200 Grain .308 Expanding Subsonic Blackout Bullets 200gr
.30-06 Spring.
MAKER .308 | 220gr | MAKER 300 blackout 220gr
.30-06 Spring.
Peregrine .308 | 155gr | Peregrine Subsonic 155gr
.30-06 Spring.
Reichenberg .308 | 154gr | Reichenberg HDB Subsonic 154gr
.30-06 Spring.
Reichenberg .308 | 200gr | Reichenberg Subsonic 200gr
.30-06 Spring.
Sierra .308 | 220gr | Sierra MatchKing 220gr
.30-06 Spring.
Styria Arms | AERO .308 | 115gr | AERO SUB,- smax:11.40 115gr
.30-06 Spring.
Styria Arms | AERO .308 | 190gr | AERO SUB,- smax:23.90 190gr
.308 Win.
Discreet Ballistics .308 | 188gr | Discreet Ballistics Selous Machined Expander 188gr
.308 Win.
Hornady .308 | 175gr | Hornady Sub-X 175gr
.308 Win.
Hornady .308 | 190gr | Hornady Sub-X 190gr
.308 Win.
Lapua .308 | 200gr | Lapua Subsonic 200gr
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