IMR 7977 is a slower burn rate in the Enduron family. It may not display this or other websites correctly. _gaq.push(['_setAccount', 'UA-6323545-2']); I have a pound of 8208 XBR for 223 development, haven't gotten round tuit yet. Being one of the easiest people in the industry to talk to, a secret this guarded certainly sparked my curiosity, so I made sure to order a test sample. Varmint shooters with small-bore cartridges love it. For more information and IMR 4166 LOAD DATA visit imrpowder.com or check the 2015 Hodgdon Annual Manual. so I am thinking till powder does come available, load one or 2 levels under Max for a 223 into the 556 cases. bolt reload data with 65 gr. Address: xxl-reloading.com, Gartenweg 9, 83661 Lenggries, Germany. Choose a IMR powder and find the respective load data for it. I loaded 23.5 gr in Lapua brass with no trouble using a 10" drop tube: http://www.xxicsi.com/powder-funnel.html This powder is comparable to Hodgdon H4831. Its a perfect burn speed for cartridges like the 308 Win/7.62mm NATO, 22-250 Remington, 257 Roberts and dozens more. Share the post "Guide to IMR Enduron Powders: 4166, 4451, 4955, 7977, 8933". This is an all-new extruded powder with a burn rate similar to Hodgdon Varget. When will Enduron powders appear on dealers shelves? Will purchase more. Temperature change stability the Enduron line is insensitive to temperature changes. IMR 4166 was released a few years ago as a temperature insensitive powder that is expected to replace 4064. IMR 4451 Another new Enduron powder that gives top performance in the venerable .30-06, 270 Winchester, and 300 Winchester Short Magnum, to name just a few. Copper fouling should be minimal, allowing shooters to spend more time shooting and less time cleaning a rifle to retain accuracy. We place limited powder inventory for sale on a regular basis on our website. CLICK HERE to Read Full Powder Temperature Stability Test on Precision RifleBlog.com. Share the post "Powder Valley has new IMR 4166 Powder in Stock". Final diagnosis: This powder is certainly a winner in the accuracy field, and if the cleanup continues to be this simple it is sure to find a home on my reloading bench. So if your goal is first-shot hits and you may shoot in a variety of conditions you should care about temperature stable powders. IMR 4166 is an extruded stick powder. IMR 4166 + 55gr V-Max in 223 Rem tailbon3 Jan 19, 2017 Help Support Long Range Hunting Forum Become a supporting member tailbon3 Well-Known Member Joined Aug 24, 2009 Messages 84 Jan 19, 2017 #1 I'm looking for some load data for the 55gr V-Max in 223 Remington with IMR 4166. Loading density is perfect for magnums, nicely filling the case at maximum charges, contributing to superb uniformity and accuracy. IMR 7977 has the slowest burn rate among the Enduron Technology powders. PRBs test team also noticed other interesting trends in the data. * All prices incl. Generally no two rifles will like the same exact load. Weve been quite pleased with IMR 8208 XBR as a Varget alternative. VISIT THE RDC WHITE HOTS White Hots 50/50 is a 50 Caliber, 50 grain pellet for muzzleloaders. Find load data for IMR 4895 propellant by clicking the button "Loads for this Powder".More about this powder:Originally a military powder featured in the 30-06, IMR 4895 is extremely versatile as a medium burn speed propellant. The accuracy results were almost identical to those of Varget, with my best group coming in at 1.05 MOA from a 24.6-grain charge of 4166not bad for an initial round of load development. I was planning to switch to 4166 for my .308, but it seems that it has also become nearly impossible to source. Expensive compared to varget. Loading density is perfect for magnums. 4451 is the medium burning powder, for medium cartridges like the .30-06 Springfield and the .270 Winchester. This is a true magnum propellant yielding outstanding performance in 6.5-300 Weatherby, 264 Win Mag, 28 Nosler and 300 Rem Ultra Mag, among other cartridges. Loading density is perfect for magnums, nicely filling the case at maximum charges, contributing to superb uniformity and accuracy. I'm very happy with this powder. IMR 7977 is the slowest burn rate Enduron Technology powder. Hodgdon Varget was the second least temperature sensitive powder in this test, with 46 fps of variance in muzzle velocity between temperatures of 25 F and 140 F. IMR 4166 performed very similar to Varget, and proved to be fairly insensitive to large swings in temperature. PrecisionRifleBlog.com (PRB) recently published results from a field test PRB conducted to quantify the temperature stability of the popular Hodgdon H4350 and Varget powders and compare those to IMRs new Enduron line of powders, specifically IMR 4166 and 4451. The 223 is the most common round. var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); On the official Hodgdon/IMR burn rate chart, IMR 4166 is between H4895 and Varget. Very consistent velocity, quality powder, not so good on powder throw due to it being a stick powder. Its loading density is perfect for magnum cartridges and contributes to superb uniformity, yielding outstanding performance in 300 Winchester Magnum, 7MM Remington Magnum and .338 Lapua Magnum. IMR 4166 in .223. Versatility with uniformity and accuracy. This propellant performs comparably to Hodgdon Varget but charge weights are materially different. For more information, go towww.P65Warnings.ca.gov. Find load data for IMR 4166 Enduron propellant by clicking the button "Loads for this Powder". First load. First, these powders all feature chemistry that reduces copper fouling. ALL Bulletin content is copyrighted, 2023 AccurateShooter.com. Minuteman. Share the post "Powder Temp Stability: IMR Enduron vs. Hodgdon Extreme". The main features of the Enduron series are copper fouling eliminator, insensitivity to temperature changes, ideal loading density and being environmentally friendly. Sounds familiar! Reviews can only be submitted while being logged in. However, to up the ante the Enduron line also utilizes copper fouling reducing technology to help keep your bore free of the hard to remove copper. works great in many cartridges with good to great accuracy. For more information and IMR 4166 LOAD DATA visit imrpowder.com or check the 2015 Hodgdon Annual Manual. It is an extruded powder with a perfect burn speed for cartridges like 308 Winchester, 7.62mm NATO, 22-250 Remington or 257 Roberts, among other cartridges. IMR 4451 is a mid-range burn speed powder, ideally suited for cartridges such as .270 Winchester, .30-06 and 300 Winchester Short Magnum. First used in battle in 1805 by United States naval forces against pirates off the coast of Algiers, DuPont supplied more than 80% of Allied Forces powder needs in World War I. bolt reload data with 65gr. Access from your Country was disabled by the administrator. If this is true, these powders should prove popular, particularly IMR 4166 which seems to be in the Varget/Reloder 15 burn-rate range. I haven't seen any Hornady loads in the manual using 4166. I have had good luck with 4166 in .223 bolt rifles. It also offers good load density and meters reasonably well. VAT (where applicable), shipping costs and possible delivery charges. The main features of the Enduron series are copper fouling eliminator, insensitivity to temperature changes, ideal loading density and being environmentally friendly. . Loading density is perfect for magnums, contributing to superb uniformity. (SEE: Temperature Effects On Zero on KestrelMeters.com.). 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. Whether youre reloading for the first time or an experienced reloader who desires elite powder, IMR is a company that should be on your radar. Learn more about Enduron powders at www.enduronimr.com. Address: xxl-reloading.com, Gartenweg 9, 83661 Lenggries, Germany. IMR 4166 possesses the fastest burn rate in the Enduron lineup. So they would likely show much larger swings than what these four top-performing powders showed. Other than that , great job, thanks. 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. Cant find Hodgdon Varget on dealers shelves? WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. forum.accurateshooter.com/threads/imr4166-loads-for-223.4053707/, Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36. when enduron works it is often same hole shooting. Any gunpowder required by handloaders can be sourced through these brands. I hope to get some time on the new bull barrel AR. 44gr 4166 3, e-mail Hornady and the powder mfg. As a medium burn speed propellant, XBR is ideally suited for cartridges like the 223 Remington/5.56mm, 308 Winchester/7.62mm NATO and the 6mm PPC. View Product Warning DEALER LOCATOR IMR Legendary Powders now offers four (4) Enduron powders: IMR 4166, IMR 4451, IMR 4955, and IMR 7977. Find load data for IMR 4198 propellant by clicking the button "Loads for this Powder".More about this powder:This fast-burning rifle powder gives outstanding performance in cartridges like the 222 Remington, 221 Fireball, 45-70, and 450 Marlin. If you commonly use Varget, Alliant Reloder 15, Norma 203B, IMR 8208 XBR, or Vihtavuori N140, you might want to try IMR 4166. 4166 is the fastest burning powder, for cartridges like .223 Remington and .308 Winchester. Improved Military Rifle IMR 4166 Improved Military Rifle IMR 4320 Improved Military Rifle IMR 4350 Improved Military Rifle IMR 4451 Improved Military Rifle IMR 4831 Improved Military Rifle IMR 4895 Improved Military Rifle IMR 8208 XBR Improved Military Rifle SR 4759 Ramshot Big Game Ramshot TAC Ramshot X-Terminator Shooters World AR PLUS IMR recommends always consulting www.IMRReloading.com for the most accurate, up-to-date data. Then Try IMR 4166 Powder, Powder Temp Stability IMR Enduron vs. H4350 and Varget, http://precisionrifleblog.com/2016/06/19/powder-temp-stability-hodgdon-extreme-vs-imr-enduron/, Powder Temp Stability: IMR Enduron vs. Hodgdon Extreme, Guide to IMRs Enduron Powders What You Need to Know, Powder Valley has new IMR 4166 Powder in Stock, IMR Introduces New Enduron Powders: 4166, 4451, 7977. . This powder is comparable to Hodgdon H4350. . .45 ACP and .38 Super, while their rifle offerings range from .223 Remington to .30-06 Springfield. $182.75. Find load data for IMR 4064 propellant by clicking the button "Loads for this Powder".More about this powder:IMR 4064 is a medium-range burn speed powder and is one of the most versatile propellant in the IMR line, used for 223 Remington, 22-250 Remington, 220 Swift, 6mm Remington, 243 Winchester Super Short Magnum, 308 Winchester, 338 Winchester Magnum, and the list goes on and on. Full Member. I understand this is an old thread, but want to reply anyway, 243 75gr V-Max loads using StaBall or IMR 4166. We are engineers, reloading enthusiasts and operate one of the most powerful ballistics calculators. Shooters has been keeping it around $20/lb if you buy in quantity. Mag. The IMR 4166 Powder may be on the slow side but will be interesting with heavier bullets. Please help us to improve and report any suggestions via our contact form. Past breakthroughs have brought us the extreme extruded line that gives consistent performance regardless of ambient temperature, and more recently they have brought us CFE technology that deters and reduces copper fouling. It is an extruded powder with a perfect burn speed for cartridges like 308 Winchester, 7.62mm NATO, 22-250 Remington or 257 Roberts, among other cartridges. Menu & Links Posted: 7/2/2021 8:19:25 PM EST. Finally, Enduron powders are environmentally-friendly, crafted from raw materials that are not harmful to the environment. .1 to .2 gr accuracy. I went to the IMR site and it takes you to hodgdon's loading site. Learn more about Enduron powders at www.enduronimr.com. Case: Winchester; Twist: 1:12 inches; Primer: Federal 210M, Large Rifle Match; Barrel Length: 24 inches; Trim Length: 2.005 inches. The Hide Armory. It is an extruded powder and provides top performance for big game cartridges like 25-06, 270 Winchester, 280 Remington and 300 Win Mag, among other cartridges. That means swings in ambient outside temperature can affect your internal ballistics, which will directly affect your muzzle velocity, which will change your bullets trajectory. 17 reviews. IMR claims that Enduron powders are not sensitive to temperature changes. Are your groups that good ? This website uses cookies to ensure the best experience possible. I don't see any info for the A-Max though. They list loads for Sperry SP and Barnes TTSX in 55gr weights. This propellant is ideally suited for many mid-range burn speed cartridges. The illuminated reticle made it very easy to see on the black target, and honestly was the first time I have ever had used the feature (now it may be hard to go back). Be Alert: Publisher cannot be responsible for errors in published load data. A versatile, match-grade propellant, IMR 4166 is comparable to Hodgdon Varget. It was less accurate than 4 other powders. For example, variation in velocity does NOT appear to be linear across the full range of temperatures. Sign up to get updates and access to exclusive promotions. Share the post "IMR Introduces New Enduron Powders: 4166, 4451, 7977". You are using an out of date browser. IMR 4166 possesses the fastest burn rate in the Enduron lineup. These new powders should compete directly with the Hodgdon Extreme Series, which gives shooters more temp-stable powder options to consider. This propellant performs comparably to Hodgdon Varget but charge weights are materially different. Assuming all other environmental conditions remain the same, an increase in air temperature will cause a flatter trajectory due to a lower air density (easier for the bullet to cut through the air). UPS has officially stopped shipping guns? It is also outstanding in cartridges like the 444 Marlin and 7.62 X 39. We continue to prioritize our shipments to our traditional sales channels to maximize powder availability at retailers. Select 223 Remington, check off your weights, select IMR, then 4166 I was able ti find a load for two different 55s, a 69, and a 75. I have heard the same criticism from other forum members. We are engineers, reloading enthusiasts and operate one of the most powerful ballistics calculators. this stuff is not affected temp at all. Plain cartridges, in contrast, turned in an average extreme spread of 51 fps. The Enduron Technology powders are available in one-pound (1 lb) and eight-pound (8-lb) containers from quality reloading retailers. Awsome powder in my book. In 2003, Hodgdon Powder Company acquired the IMR brand bringing these prestigious powders under the umbrella that also includes Hodgdon, Winchester and GOEX. IMR is an acronym for Improved Military Rifle. By that, they mean the change per degree from 20 to 65 might be smaller or larger than the change per degree from 65 to 140. JavaScript is disabled. CC 300 BLK ($53.49 per box of 20), Law Tactical Gen 3-M AR Folding Stock Adapter, 2022 Editors Choice Award Winning Silencer Central Banish Backcountry Suppressor. The maxorder quantity of any powder SKU is. These are the first groups with this powder. It is equally effective in small-capacity varmint cartridges from 223 Remington to 22-250 Remington, and it's a great 30-30 Winchester powder. var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); IMR 4451 had the largest swing in muzzle velocity of the powders tested, but keep in mind just 68 fps over 115 F swing is still a good performance. Share the post "Guide to IMRs Enduron Powders What You Need to Know", Powder Valley Inc. (PVI) now has the new IMR 4166 powder. Whether a rifle is sighted in during the heat of summer, hunted in a November snowstorm or hunting multiple locations with drastic temperature swings, point of impact with ammunition loaded with Enduron technology will be very consistent. Sounds familiar! Find load data for IMR 7828 SSC propellant by clicking the button "Loads for this Powder".More about this powder:IMR 7828 SSC is a magnum rifle powder with exactly the same burn rate as standard IMR 7828 and uses the same data. ga.src = ('https:' == document.location.protocol ? Thanks, T.B. .225 Win. - 24hourcampfire Previous Thread Next Thread Print Thread Hop To BP-B2 IC-A B3 IC-B B4 RR1-22 Who's Online Now 828 members ( 10Glocks, 12344mag, 007FJ, 1911a1, 1100mag, 95 invisible), 2,340 guests, and 1,313 robots. When we are sold out, we are sold out. The top shooters in the PRS and veteran long-range shooters in other disciplines have learned to value a temperature-stable powder. Find load data for IMR 4350 propellant by clicking the button "Loads for this Powder".More about this powder:IMR 4350 is a medium- to slow-burn rate propellant and is the number one choice for the new short magnums, both Remington and Winchester versions. They both love it. _gaq.push(['_setDomainName', '.accurateshooter.com']); ), AR Issue 2022 Gun & Gear Giveaway Contest, Editors Choice Gun & Gear Giveaway Contest, Fall Hunting 2021 Gear & Giveaway Contest, Defensive Handgun Gun & Gear Giveaway Contest, Defensive Handgun Issue Gun & Gear Giveaway, The Hunter to the Hunted: Savage Arms Introduces New 110 Carbon, Wilson Combat 300 HAMR Barrel Conversion, 2022 Editors Choice Award Winning SIG Sauer P322 .22LR, 2022 Editors Choice Award Winning Savage Mo. for 223. Shop Now ! The IMR Enduron line is similar to Hodgdon's Extreme Extruded line, in that it is temperature insensitive. [ARCHIVED THREAD] - IMR 4166 .223 Rem. Good luck. . both should give you specific info. msinc Find load data for IMR 4831 propellant by clicking the button "Loads for this Powder".More about this powder:IMR 4831 has a slightly slower burn rate speed than IMR 4350. Using Hodgdon's online Reloading Data Center I find IMR 4166 listed as an appropriate powder for several 223 loads, from 50 grains bullets all the way up to 90 grain bullets. Subscribe to the free newsletter and do not miss any news or promotions. A Meopta MeoStar 1.710x riflescope was mounted to ensure an optimum sight picture. However, Alliants relatively new Reloder 16 is an extremely temp-stable powder, with a burn rate that is a close match to H4350. IMRs press release states: IMR 4166 [has] a perfect burn speed for cartridges like the 308 Win/7.62mm NATO, 22-250 Remington and dozens more.. So far IMR4166 has worked great for me in the .243 Winchester with light bullets, the .257 Roberts with 75-100 grains bullets, .308 Winchester with 150's and 168's, the .303 British, 8x57 and .45-70 with "low pressure" loads. IMR Enduron 4166 is a versatile, match-grade propellant, with the fastest burn rate in the Enduron line. This helps attain low ES/SD in velocity and pressure, which translates to improved long-range accuracy and tight verticals. The responsible reloader always errs on the side of caution, so I decided to stop there. var _gaq = _gaq || []; Thread starter cornhusker; Start date Sep 18, 2017; Forums. When I hit that node It's going to be great. I went online and found data published by the manufacturer, so I worked with that for my 30 06. Average extreme velocity spread was only 19 fps for 15 Sierra 142-grain MatchKing bullets fired from prepared cases filled with precisely weighed IMR-4166 charges. Posted by Christopher Brown on Apr 19th 2022. * All prices incl. The IMR series of handloading powders were the only choice to wring full performance out of rifle calibers. : (913) 362-9455; E-mail: [emailprotected]; Web: www.imrpowder.com, (Disclaimer: The loads described above were safe for this rifle, on this particular day. Naturally the next step was to combine the two for a new line of powders. This is a true magnum propellant yielding outstanding performance in 300 Winchester Magnum, 7mm Remington Magnum and 338 Lapua, among other cartridges. IMR 4166 is part of their new Enduron line that launched just a few years back. Share your experiences with other customers. .308 Winchester (IMR-4166 Data) Warning! VAT (where applicable), shipping costs and possible delivery charges. We do not take backorders and our Tech Services team cannot take orders via email or phone. The IMR brand was first introduced under DuPont in the 1930s. When we are sold out, we are sold out. FPS low 2735 high 2789 })(); To comment on a post, click Post Title or "Comment" Link. Clearly, the competitor's 'choice' and the Varmint Hunter's 'dream powder.'. IMR now offers four Enduron powders that cover a broad range of burn rates. Moving on, the individual loads were fired and the barrel was allowed to cool between each group. For example, IMR 4166 is a good replacement for Hodgdon Varget (commonly used in the .223 Rem, 6mmBR and .308 Win), while IMR 4955 is a fine substitute for H4831 (favored by F-Open shooters for the .284 Win and 7mm WSM cartridges). This propellant performs comparably to Hodgdon Varget but charge weights are materially different. The IMR brand was created under the DuPont Corporation. IMR Enduron 4166 is a versatile, match-grade propellant, with the fastest burn rate in the Enduron line. It is an extruded powder with a perfect burn speed for cartridges like 308 Winchester, 7.62mm NATO, 22-250 Remington or 257 Roberts, among other cartridges. 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. Here on Ultimate Reloader you can count on a LOT of AR-15 content coming over the next year: everything from reloading .223/5.56, to hunting, a lot more with suppressors, and some custom AR-15 rifle action! The new powder line-up comes in three flavors: 4166, 4451 and 7977. Hodgdon Powder Co., distributors of Hodgdon, IMR, and Winchester powders, says that: The new IMR Enduron Technology powders will be available at dealers in early 2015 in 1-pound and 8-pound containers. For more information and Enduron LOAD DATA visit imrpowder.com or check the 2015 Hodgdon Annual Manual. IMR offers a modern line of powders with Enduron Technology which is also marketed to have extreme temperature stability. Anyone seen/tried this combo? Anyway, I like the 4166! The manual allows for stiffer charges, but at 25.1 the load begins to compress. PRBs testers talk about those things, provide a few other insightful views of the data, and discuss tools that can help you manage temp/muzzle velocity in the field in their full post. IMR 4166 powder? Love the copper fouling eliminator makes cleaning a breeze. IMRs press release states: IMR 4166 [has] a perfect burn speed for cartridges like the 308 Win/7.62mm NATO, 22-250 Remington, 257 Roberts and dozens more.. Find load data for IMR 4166 Enduron propellant by clicking the button "Loads for this Powder".More about this powder:IMR End. If you commonly use Varget, Alliant Reloder 15, Norma 203B, IMR 8208 XBR, or Vihtavuori N140, you might want to try IMR 4166. Share the post "Cant Find Varget for Sale? The main features of the Enduron series are copper . This propellant performs comparably to Hodgdon H4831 but charge weights are materially different. IMR 4166 possesses the fastest burn rate in the Enduron lineup. You may not reproduce original text or photos without advanced permission in writing. In rifles, this powder delivers excellent velocity and accuracy in such cartridges as the 22 Hornet and 221 Fireball. It is primarily a pistol powder but has some application in rifles. Loading density is perfect for magnums, contributing to superb uniformity. I'm using this in my Tikka CTR 223 under 73 gr Berger BT target bullets. Loads case to bottom of bullet, clean burning, very consistent, accurate results with no flyers, flows thru powder measure with a. In another study, IMR 4166 was identified as the best replacement for Varget between 61F and 103F for .308 F-TR rifles. Fired from My Rock River Arms National Match upper, these rounds consistently fetch accuracy in the .75 to 1.25 MOA area. Hodgdon Extreme Series powders have attracted quite a fan base, with over 90% of the top shooters in the Precision Rifle Series choosing to run one of those powders. imr 4166 for sale .223, .223 loading data imr 4166, .223 rem. _gaq.push(['_setDomainName', '.accurateshooter.com']); Load data should be forthcoming pretty soon. The technology in IMRs Enduron line of powders provides four very important qualities that enhance both in-gun and downrange performance. The new line of IMR Enduron powders feature small kernels for easy metering, plus a built-in copper fouling eliminator. ALL Bulletin content is copyrighted, 2023 AccurateShooter.com. First load. IMR recommends always consulting www.IMRReloading.com for the most accurate, up-to-date data. Not a brand to rest on its laurels, IMR continues to develop new powder formulas that are increasingly insensitive to weather and temperature changes, have improved burn speeds, and contain additives that remove copper bullet jacket fouling. One member wrote: in my 6.547 IMR 4166 gives speeds and accuracy pretty much exactly the same as Varget. And other shooters have observed reduced copper fouling with Enduron series powders, so IMRs Enduron anti-fouling chemistry does seem to work. A versatile, match-grade propellant, IMR 4166 is comparable to Hodgdon Varget. This included the top-of-the-line Prometheus Gen II Powder Scale, which is capable of loading to the nearest kernel of powder. . Shooter's Reference Load Data for .223 Remington .223 Remington - Published Manufacturer Loading Data Shellholders: Hornady #16 Lee #4 Lyman #26 RCBS #10 Recipe Type: Rifle 55,000 PSI STANDARD SAAMI COMMERCIAL SPECIFICATIONS Pistol CUSTOM LONG THROAT Reduced Load Bullet Weight: ALL 30 gr 34 gr 35 gr 36 gr 40 gr 42 gr 43 gr 45 gr 50 gr 51 gr 52 gr This Enduron series powder is temp-stable and accurate. SUBSCRIBE TO OUR NEWSLETTER TO STAY UP ON THE LATEST. The LabRadar is a new type of device that allows you to measure muzzle velocity within at least +/- 0.1% of the reading. If a pistol says Magnum, IMR 4227 is the choice for true magnum velocities and performance. I tried 4166 and my groups opened up. Was looking for an equivalent powder from H4895 when I ran into the 4166. Was able to find a node fairly quickly and with a little seating adjustment, it's shooting .3 moa or better. 44gr 4166 IMR now offers five (5) Enduron powders: IMR 4166, IMR 4451, IMR 4955, IMR 7977, and IMR 8133. DuPont had historically been a major supplier of military propellants long before becoming one of the handloaders favorite powders. I've only seen a handful of load data for IMR 4166 and 223, it was 69 Sierra and 77 Sierra. We place limited powder inventory for sale on a regular basis on our website. Very happy with the results. Clean and inspect the cases, lube and full-length resize/decap, clean, and inspect them again. 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; Newtosavage Dec 9, 2020 #9 ericwh Well Known Rokslider Joined Mar 9, 2017 Messages 479 Location PA Powder Temp Stability: Hodgdon Extreme vs. IMR Enduron then consider IMR 4166. The weight of a kernel of 4166 was almost double the weight of a kernel of H4895, and they were clearly larger. IMR now offers four Enduron powders that cover a broad range of burn rates. 3, tried this powder and same bullet in the grandson's Ruger77 .223. Comprehensive load data for IMR 4166 Enduron reloading powder und technical specifications for this propellant.