The IMR brand was first introduced under DuPont in the 1930s. I have had good luck with 4166 in .223 bolt rifles. It is available right now at Midsouth Shooters and Powder Valley in both one-pound and 8-pound containers: For more information and LOAD DATA visit IMRpowder.com and navigate to the Hodgdon Reloading Center. If you commonly use Varget, Alliant Reloder 15, Norma 203B, IMR 8208 XBR, or Vihtavuori N140, you might want to try IMR 4166. Site Notices. Find load data for IMR 8208 XBR propellant by clicking the button "Loads for this Powder".More about this powder:IMR 8208 XBR is an accurate-metering, super short-grained extruded rifle powder was designed expressly for match, varmint, and AR sniper cartridges. IMR 8133 IMR Enduron 8133 is the slowest burn rate in the Enduron family. Its a perfect burn speed for cartridges like the 308 Win/7.62mm NATO, 22-250 Remington, 257 Roberts and dozens more. Fired from My Rock River Arms National Match upper, these rounds consistently fetch accuracy in the .75 to 1.25 MOA area. The new powder line-up comes in three flavors: 4166, 4451 and 7977. I don't see any info for the A-Max though. We need to get back to the good old days! The IMR brand was created under the DuPont Corporation. At 600 yds, the POI with 4166 loads was about 1.2 MOA higher than when using 43.2 gr. To me that says Gebby got it right long ago. IMR Enduron 4166 is a versatile, match-grade propellant, with the fastest burn rate in the Enduron line. However, Alliants relatively new Reloder 16 is an extremely temp-stable powder, with a burn rate that is a close match to H4350. This Enduron series powder is temp-stable and accurate. ALL Bulletin content is copyrighted, 2023 AccurateShooter.com. ga.src = ('https:' == document.location.protocol ? ARCHIVED. of 4166 in Peterson SRP brass topped with 168 gr SMK's seated 0.010" off gave me great performance. This powder is comparable to Hodgdon H4831. Find load data for IMR 4166 Enduron propellant by clicking the button "Loads for this Powder". $49.99 - $357.99 4.48 17 reviews IMR Enduron 4166 is a versatile, match-grade propellant, with the fastest burn rate in the Enduron line. Any gunpowder required by handloaders can be sourced through these brands. 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 is an all-new extruded powder with a burn rate similar to Hodgdon Varget. of Varget. The Hide Armory. In addition, it is a longtime favorite of Match shooters. $182.75. Love the copper fouling eliminator makes cleaning a breeze. Thanks, T.B. It acts a whole lot like Varget, but is much easier to find. 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.. Shop Now ! 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. 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. Precision shooters will find an Enduron option well-suited to most popular precision cartridge types. Has anyone left switched from 4064 to 4166 without losing accuracy? 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. Full Member. It also offers good load density and meters reasonably well. IMR recommends always consulting www.IMRReloading.com for the most accurate, up-to-date data. From the 17 Remington to the 243 Winchester to the 375 H&H Magnum, accuracy and performance are excellent. If you are the site owner (or you manage this site), please whitelist your IP or if you think this block is an error please open a support ticket and make sure to include the block details (displayed in the box below), so we can assist you in troubleshooting the issue. PRBs test team also noticed other interesting trends in the data. A Meopta MeoStar 1.710x riflescope was mounted to ensure an optimum sight picture. Once they had a couple dozen rounds loaded with each powder, they went and shot them with each powder at 25 F, 65 F, and 140 F. The muzzle velocity of each shot was recorded using BOTH a LabRadar Doppler Radar and a MagnetoSpeed Chronograph. Choosing 4166, I decided to use it in place of my usual choice of Varget in a known accurate cartridge and rifle combination. I went to the IMR site and it takes you to hodgdon's loading site. Most powders arent specially formulated to be temperature stable. IMR 4166 possesses the fastest burn rate in the Enduron lineup. (function() { The 4166 seemed interestingit matched my motorcycle jacket, but none of my reloading manuals had any data for it (it's that new). Choose a IMR powder and find the respective load data for it. PRBs testers explain the full set of equipment and steps in their loading process in the Full Test Report. Trim to length as needed, clean/uniform the primer pockets, reprime, charge with powder, verify powder charges, seat bullets to specific overall length, perform final inspection, box, and label. 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. For this reason, the IMR brand powders truly are Legendary products. Loading density is perfect for magnums, nicely filling the case at maximum charges, contributing to superb uniformity and accuracy. We do not take backorders and our Tech Services team cannot take orders via email or phone. This ensured the powder charges were identical for each round of ammo. 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. 7977 is the slowest of the batch, for shoulder thumpers like the .338 Lapua and the .470 Nitro Express. I'm using this in my Tikka CTR 223 under 73 gr Berger BT target bullets. 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. 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. This propellant performs comparably to Hodgdon Varget but charge weights are materially different. For a better experience, please enable JavaScript in your browser before proceeding. var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); 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). When I approached Chris Hodgdon with the question Does it stop copper from fouling or remove it with each shot? with a smirk he responded Its a proprietary formula. 110 PCS pistol, 2022 Editors Choice Award Winning Ruger 5.7 LC Carbine, 2022 Editors Choice Award Winning Mossberg 940 Pro Tactical 12-gauge, Fiocchi Introduces New 5.7x28mm Subsonic Ammo, Lehigh Defense 115-gr. The maxorder quantity of any powder SKU is. Being a short-grain extruded powder it can be dumped from a powder measure; however I always opt to use a dispenser like the Hornady Auto charge. Shooters looking for readily-available alternatives to hard-to-find extruded powders should definitely check out the Enduron line-up. First load. 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 The main features of the Enduron series are copper fouling eliminator, insensitivity to temperature changes, ideal loading density and being environmentally friendly. You are using an out of date browser. New customer? IMR 7977 is a slower burn rate in the Enduron family. You may not reproduce original text or photos without advanced permission in writing. IMR Enduron 4166 is a versatile, match-grade propellant, with the fastest burn rate in the Enduron line. 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. It may be that if I did more load development I could close the gap. spitzer boat tail & imr 4166, 223 80 gr bullet imr 4166, 223 load with imr 4166, 243 barnes 80 gr ttsx imr 4166 load data, 243 barnes 80gr ttsx imr 4166 load data, 243 barnes ttsx with imr 4166 load data, 243 barns ttsx with imr 4166 . The Enduron Technology powders are available in one-pound (1 lb) and eight-pound (8-lb) containers from quality reloading retailers. It provides top performance in big game cartridges such as 25-06, 280 Remington and 300 Winchester Magnum. So they would likely show much larger swings than what these four top-performing powders showed. The technology in IMRs Enduron line of powders provides four very important qualities that enhance both in-gun and downrange performance. It is primarily a pistol powder but has some application in rifles. This website uses cookies to ensure the best experience possible. When placed and configured optimally, the LabRadar can measure muzzle velocity with +/- 0.1% accuracy, according to the manufacturer. This allows up to 4% more powder space in the case and in many loads yields more velocity than standard 7828. Find load data for IMR 4451 Enduron propellant by clicking the button "Loads for this Powder".More about this powder:IMR Enduron 4451 is a versatile, match-grade propellant with a mid-range burn speed in the Enduron line. IMR 4166 in .223. You can see Hodgdon H4350 had the least variance in muzzle velocity, with just 25 fps over the 115 swing in temperature! Each of these are still favorites with handloaders today! 3, tried this powder and same bullet in the grandson's Ruger77 .223. _gaq.push(['_setAccount', 'UA-6323545-2']); Varmint shooters with small-bore cartridges love it. Then Try IMR 4166 Powder", A couple seasons back, PrecisionRifleBlog.com (PRB) published a significant field test of powder temperature stability. I bought all three. When we are sold out, we are sold out. It is a true magnum cartridge propellant with outstanding performance in such cartridges as the .300 Winchester Magnum, 7mm Remington Magnum, .338 Lapua and more. Really like this powder, the accuracy it produces is amazing I will lots more if I can find it. Picked up a lb of this stuff to do a little testing with, see if it compares to Varget for accuracy in .223. 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. This propellant performs comparably to Hodgdon Varget but charge weights are materially different. ), 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. I use in 243 Win and 6.5 CM. Share the post "IMR Introduces New Enduron Powders: 4166, 4451, 7977". Testing consisted of a single 5-shot group of each incrementmental charge weight just to get a rough feel for the potential of this powder. I understand this is an old thread, but want to reply anyway, 243 75gr V-Max loads using StaBall or IMR 4166. If you commonly use Varget, Alliant Reloder 15, Norma 203B, IMR 8208 XBR, or Vihtavuori N140, you might want to try IMR 4166. Importantly, it seems to be a good substitute for unobtanium Varget powder. Reloading for 223/556 Service Rifle Competition (NRA/CMP bullseye . Enduron powders are formulated to reduce fouling and to be stable across a wide temperature range. IMR 4955 is a medium burn speed powder, falling in between IMR 4451 and IMR 7977 in burn speed. 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. It is an extruded powder and is perfect for cartridges like 270 Winchester, 30-06 or 300 Winchester Short Magnum, among others. 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. It provides top velocities and performance with heavier bullets in medium-sized magnums. The IMR series of handloading powders were the only choice to wring full performance out of rifle calibers. 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. Find load data for IMR 4166 Enduron propellant by clicking the button "Loads for this Powder".More about this powder:IMR End. Some powders are more affected by changes in temperature than others. 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 didn't want to like this stuffI figured I was likely buying marketing hype for $31/lb at my LGS. My factory sierra high 2576 I went online and found data published by the manufacturer, so I worked with that for my 30 06. If a pistol says Magnum, IMR 4227 is the choice for true magnum velocities and performance. when enduron works it is often same hole shooting. Shooters will find IMR 8208 XBR yields max velocities and 'tack driving' accuracy. OAL 2770 Sierra Case On the official Hodgdon/IMR burn rate chart, IMR 4166 is between H4895 and Varget. For more information and IMR 4166 LOAD DATA visit imrpowder.com or check the 2015 Hodgdon Annual Manual. FPS low 2735 high 2789 The 223 is the most common round. You may not reproduce original text or photos without advanced permission in writing. Reloading 223/ 5.56 for the AR-15 with IMR 4166 30-06JOHN, GUNS AND RELOADING 1.86K subscribers 2.8K views 1 year ago I reload .223/ 5.56 for the AR-15 using a powder not popular, IMR. Ive heard some say 4166 is similar to 4064, which I haven't used or have on hand currently. This website uses cookies to ensure the best experience possible. Be Alert: Publisher cannot be responsible for errors in published load data. 2. 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. .225 Win. The main features of the Enduron series are copper fouling eliminator, insensitivity to temperature changes, ideal loading density and being environmentally friendly. IMR 4166 Enduron Sounds familiar! Third, Enduron powders are designed for optimal load density. var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; We place limited powder inventory for sale on a regular basis on our website. 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. It is the perfect burn speed for cartridges such as .308 Win, 7.62mm NATO, 22-250 Rem and 257 Roberts. IMR offers a modern line of powders with Enduron Technology which is also marketed to have extreme temperature stability. I loaded 23.5 gr in Lapua brass with no trouble using a 10" drop tube: http://www.xxicsi.com/powder-funnel.html A versatile, match-grade propellant, IMR 4166 is comparable to Hodgdon Varget. so I am thinking till powder does come available, load one or 2 levels under Max for a 223 into the 556 cases. 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; Address: xxl-reloading.com, Gartenweg 9, 83661 Lenggries, Germany. Precision shooters will find an Enduron option well-suited to most of the popular precision cartridge types. Find load data for IMR 4955 Enduron propellant by clicking the button "Loads for this Powder".More about this powder:IMR Enduron 4955 is a versatile, match-grade propellant with a mid-range burn speed that is in between IMR4451 and IMR7977. Find load data for IMR 4166 Enduron propellant by clicking the button "Loads for this Powder".More about this powder:IMR Enduron 4166 is a versatile, match-grade propellant, with the fastest burn rate in the Enduron line. The main features of the Enduron series are copper fouling eliminator, insensitivity to temperature changes, ideal loading density and being environmentally friendly. Choose from a variety of powders for everything from small-caliber ammo to magnum rifle cartridges in both 1 lb canisters and 8 lb jugs. If you enjoy the forum please consider supporting it by signing up for aNES Membership The benefits pay for the membership many times over. In this post, I've got some great highlights including the LEE . Awsome powder in my book. very consistent in .243 shooting 65gr vmax and 3550 fps. _gaq.push(['_setDomainName', '.accurateshooter.com']); 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. To be able to use the full range of Shopware 6, we recommend activating Javascript in your browser. Anyway, I like the 4166! 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. 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. Or maybe have QuickLoad data? IMR 8208 XBR is accurate, clean-burning, and offers good velocity. The IMR 4166 shows loads for a 69 hpbt. 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 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. The components in question make up my service rifle load in .223 and they are Hornadys 55 grain V-max bullet seated into a Lake City brass case at an OAL of 2.270 and ignited with a Wolf Small Rifle Primer. You are using an out of date browser. for 223. IMR 4166: This newer propellant produced by General Dynamics in Canada had the best temperature insensitivity and may be the best substitute for Varget across a wide temperature range with 77 to 80 grain bullets. Loading density is perfect for magnums, contributing to superb uniformity. Thanks, Was looking for an equivalent powder from H4895 when I ran into the 4166. 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. Learn more about Enduron powders at www.enduronimr.com. VAT (where applicable), shipping costs and possible delivery charges. - 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. Most powders arent specially formulated to be temperature stable. Many F-Open competitors are now using Reloder 16 with considerable success. The manual allows for stiffer charges, but at 25.1 the load begins to compress. These new powders should compete directly with the Hodgdon Extreme Series, which gives shooters more temp-stable powder options to consider. .45 ACP and .38 Super, while their rifle offerings range from .223 Remington to .30-06 Springfield. Villain Weapon Systems ATPIAL-C EFL -- Enhanced Class 3R Performance Available Now from TNVC! Case: Winchester; Twist: 1:12 inches; Primer: Federal 210M, Large Rifle Match; Barrel Length: 24 inches; Trim Length: 2.005 inches. Cant Find Varget for Sale? 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. UPS has officially stopped shipping guns? Using bullets from Nosler BT LF, Barnes VG FB, Nosler BT, SinterFire, Sierra SP, Speer SP, Sierra HP, Barnes TSX FB, Hornady FMJ, Hornady V-Max, Swift Scirocco, Sierra HPBT, JLK VLD, Sierra MK, Berger BT Targ. The test was designed to quantify the temperature stability of Hodgdon H4350 and Varget powders compared to IMRs Enduron line of powders, specifically IMR 4166 and 4451. spitzer boat tail & imr 4166, .223 rem. works great in many cartridges with good to great accuracy. The Enduron Technology powders are available in one-pound (1 lb) and eight-pound (8-lb) containers from quality reloading retailers. Anyone seen/tried this combo? ga.src = ('https:' == document.location.protocol ? The main features of the Enduron series are copper . First, these powders all feature chemistry that reduces copper fouling. For more information, go towww.P65Warnings.ca.gov. Find load data for IMR 8133 Enduron propellant by clicking the button "Loads for this Powder".More about this powder:IMR Enduron 8133 is the slowest burn rate in the Enduron family. Tried their 7977 in a magnum rifle and it had same accuracy as H1000. Great stuff! The top shooters in the PRS and veteran long-range shooters in other disciplines have learned to value a temperature-stable powder. Trail Boss is based on new technology that allows very-high loading density, good flow through powder measures, stability in severe temperature variation, and, most importantly, additional safety to the handloader. IMR Enduron 4166 is a versatile, match-grade propellant, with the fastest burn rate in the Enduron line. WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Other than that , great job, thanks. VAT (where applicable), shipping costs and possible delivery charges. Loads case to bottom of bullet, clean burning, very consistent, accurate results with no flyers, flows thru powder measure with a. I did the usual load development testing and found that 43.0 gr. Load data for the new IMR 4166 was taken from Hodgdons 2015 Annual reloading manual, and in increments of .3 grains or less, loads were worked up from 24.0 through 25.1 grains of IMR 4166. . Share your experiences with other customers. Anyone seen/tried this combo? Sign up to get updates and access to exclusive promotions. Please help us to improve and report any suggestions via our contact form. CL 2.005 More about this powder: IMR Enduron 4166 is a versatile, match-grade propellant, with the fastest burn rate in the Enduron line. IMR 4166 Enduron Find load data for IMR 4166 Enduron propellant by clicking the button "Loads for this Powder".More about this powder:IMR Enduron 4166 is a versatile, match-grade propellant, with the fastest burn rate in the Enduron line. The rifle was placed on the 50 yard line and supported both fore and aft by sandbags. IMR 7977 is comparable to Hodgdon H1000. The maxorder quantity of any powder SKU is, https://shop.hodgdon.com/sites/www/files/2022-04/2022-IMR%20Endurons%20SDS.pdf, https://shop.hodgdon.com/sites/www/files/2020-08/sell-sheet-imr-enduron-final.p. Thread starter cornhusker; Start date Sep 18, 2017; Forums. 44gr 4166 Hodgdon's excellent online reloading data show only IMR 4007SSC, IMR 4166, IMR 8208XBR, and Hodgdon CFE 223 breaking 3,750 fps with a 55-grain bullet in a 24-inch test barrel. 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). View Product Warning DEALER LOCATOR 44gr 4166 The first IMR reloading powders included ever popular favorites IMR3031 (1934), IMR4064 (1935) and IMR4350 (1940). Posted by Christopher Brown on Apr 19th 2022. Find load data for IMR 7977 Enduron propellant by clicking the button "Loads for this Powder".More about this powder:IMR Enduron 7977 is a slower burn rate in the Enduron family. Tag: IMR 4166 Loading for the AR-15 with the LEE Auto-Drum Powder Measure. Thanks, Posted by Phillip Jackson on Aug 1st 2021. 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. The main features of the Enduron series are copper fouling eliminator, insensitivity to temperature changes, ideal loading density and being environmentally friendly. Clean and inspect the cases, lube and full-length resize/decap, clean, and inspect them again. Taking the rifle back to the workbench for a cleanup proved the claimit had virtually no copper fouling, as proven by the absence of a blue hue in the exiting patch soaked in Sweets 7.62 bore solvent. IMR now offers four Enduron powders that cover a broad range of burn rates. * All prices incl. IMR Enduron 4166 is a versatile, match-grade propellant, with the fastest burn rate in the Enduron line. It's been over two years of this ammo & reloading nightmare. IMR 4451 is a mid-range burn speed powder, ideally suited for cartridges such as .270 Winchester, .30-06 and 300 Winchester Short Magnum. Where to Find IMR 4166 Powder Copper fouling reduction these powders contain an additive that drastically reduces copper fouling in the gun barrel. IMR 4955 is a medium burn speed powder, falling in between IMR 4451 and IMR 7977 in burn speed. I'm looking for some load data for the 55gr V-Max in 223 Remington with IMR 4166. Give it a try if you've already purchased it. Sierra load data for over 95 Berger bullets in over 65 calibers with all suitable powders on the market. First ladder turned out great! 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. Sign up to get updates and access to exclusive promotions. In another study, IMR 4166 was identified as the best replacement for Varget between 61F and 103F for .308 F-TR rifles. Today, only the newest reloading fuels can exceed that with a 55-grain bullet in the commercial .22-250. Or maybe have QuickLoad data? Address: xxl-reloading.com, Gartenweg 9, 83661 Lenggries, Germany.