Description
IMR Enduron® 4166 is a versatile, match-grade extruded propellant and the fastest-burning option in the Enduron line. Its burn speed is identified as a fit for cartridges including .308 Winchester, 7.62mm NATO, .22-250 Remington, and .257 Roberts, among other cartridges.
Enduron-series characteristics include copper fouling eliminator, insensitivity to temperature changes, ideal loading density, and environmentally friendly attributes. These features distinguish IMR 4166 within the IMR Enduron propellant family.
IMR Enduron® 4166 performs comparably to Hodgdon Varget, though charge weights are materially different. It is made in Canada and is available in 1-pound and 8-pound containers.
- Match-grade extruded propellant
- Fastest burn rate in the Enduron line
- Listed for .308 Winchester and 7.62mm NATO
- Also listed for .22-250 Remington and .257 Roberts
- Enduron copper fouling eliminator feature
- Insensitive to temperature changes
- Available in 1-pound and 8-pound containers
- Made in Canada
Product Info
- Warnings:
- WARNINGS FOR CALIFORNIA RESIDENTS
- SDS:
- SAFETY DATA SHEET
- Type:
- Rifle
- Info:
- SALES & SHIPPING
- Group:
- Smokeless Powder
- Temperature_Stable:
- Yes
- Extra_Clean_Burn:
- No
- Form:
- Extruded
- Family:
- Enduron
- Subsonic:
- No
- Base:
- Single
- Q&A:
- Is IMR Enduron 4166 suitable for .308 Winchester?
- It is suitable for cartridges listed by IMR, including .308 Winchester, 7.62mm NATO, .22-250 Remington, and .257 Roberts.
- What are the key features of IMR Enduron 4166?
- Its stated features include an extruded form, match-grade designation, copper fouling eliminator, temperature-change insensitivity, ideal loading density, and environmentally friendly Enduron-series attributes.
- What is IMR 4166 used for?
- IMR identifies it as a versatile propellant with a burn speed suited to the listed rifle cartridges and other cartridges.
- Which container sizes are available for IMR 4166?
- It is offered in 1-pound and 8-pound containers.
Reviews
15 Reviews
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IMR4166
very consistent in .243 shooting 65gr vmax and 3550 fps. temperature stable too. worst groups at .5 moa most groups around the .3 moa mark.
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IMR 4166
Varget was always my go-to powder for .308 and .223, but anyone who reloads knows that Varget is virtually unobtainable now. I have enough on hand to last for a while, but when I found some IMR 4166 available, I decided to try it for my MPA .308. I did the usual load development testing and found that 43.0 gr. of 4166 in Peterson SRP brass topped with 168 gr SMK's seated 0.010" off gave me great performance. At 600 yds, the POI with 4166 loads was about 1.2 MOA higher than when using 43.2 gr. of Varget. I shot a 4.125", 10-shot group at 600 yds - well under 1 MOA and slightly better than my Varget loads, although they were close enough that I attribute the difference to the shooter. I was planning to switch to 4166 for my .308, but it seems that it has also become nearly impossible to source. It's been over two years of this ammo & reloading nightmare. We need to get back to the good old days! Anyway, I like the 4166!
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imr4166 is great in 6mm dasher
I use this powder in my 6mm dasher bench gun. the accuracy is the same as varget but the velocity is a bit higher with a couple of 10ths less powder. this stuff is not affected temp at all. I live in florida and shoot the same load all year. Great stuff!
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4166 Enduron
Really like this powder, the accuracy it produces is amazing I will lots more if I can find it. Love the copper fouling eliminator makes cleaning a breeze
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Very consistent velocity
Very consistent velocity, quality powder, not so good on powder throw due to it being a stick powder. Other than that , great job, thanks.
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4166 in my 223
I'm using this in my Tikka CTR 223 under 73 gr Berger BT target bullets. Was able to find a node fairly quickly and with a little seating adjustment, it's shooting .3 moa or better. I'm very happy with this powder.
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First 308 loads
Was looking for an equivalent powder from H4895 when I ran into the 4166. First load. CL 2.005 OAL 2770 Sierra Case 44gr 4166 5 rounds shot FPS low 2735 high 2789 My factory sierra high 2576... Awsome powder in my book.
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Imr-4166 in 30-30 win.
Loads case to bottom of bullet, clean burning, very consistent, accurate results with no flyers, flows thru powder measure with a. .1 to .2 gr accuracy. Will purchase more. Thanks
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.308
This is a great powder for my .308,.
