imr 4166 load data 223 imr 4166 load data 223

Well, Im done Adulting for Today and Tomorrow. 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. In 2003, Hodgdon Powder Company acquired the IMR brand bringing these prestigious powders under the umbrella that also includes Hodgdon, Winchester and GOEX. The maxorder quantity of any powder SKU is. Mag. I hope to get some time on the new bull barrel AR. 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. })(); To comment on a post, click Post Title or "Comment" Link. .1 to .2 gr accuracy. - 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. I'm very happy with this powder. IMR 4166 Enduron The pelletized form makes for faster reloads with pre-formed charges that easily drop down the barrel and is easy to pack without the need for measures or funnels. 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. Are your groups that good ? [ARCHIVED THREAD] - IMR 4166 .223 Rem. 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. Any gunpowder required by handloaders can be sourced through these brands. Between 1/3 and 1/2 MOA for 5 shot groups at 200yd. 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. Second, Enduron powders are all very temp-stable. This propellant performs comparably to Hodgdon Varget but charge weights are materially different. IMR is an acronym for Improved Military Rifle. These new powders should compete directly with the Hodgdon Extreme Series, which gives shooters more temp-stable powder options to consider. Loads case to bottom of bullet, clean burning, very consistent, accurate results with no flyers, flows thru powder measure with a. IMR recommends always consulting www.IMRReloading.com for the most accurate, up-to-date data. 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; When placed and configured optimally, the LabRadar can measure muzzle velocity with +/- 0.1% accuracy, according to the manufacturer. They list loads for Sperry SP and Barnes TTSX in 55gr weights. . 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 IMR 8133 IMR Enduron 8133 is the slowest burn rate in the Enduron family. IMR 4166 is one of the new Enduron family of propellants. 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. The main features of the Enduron series are copper fouling eliminator, insensitivity to temperature changes, ideal loading density and being environmentally friendly. Generally no two rifles will like the same exact load. 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. Varmint shooters with small-bore cartridges love it. I use this powder in my 6mm dasher bench gun. Please enter your login details below. PRBs test team also noticed other interesting trends in the data. IMR 4955 is a medium burn speed powder, falling in between IMR 4451 and IMR 7977 in burn speed. IMR Legendary Powders now offers four (4) Enduron powders: IMR 4166, IMR 4451, IMR 4955, and IMR 7977. Share the post "Powder Temp Stability: IMR Enduron vs. Hodgdon Extreme". Anyone seen/tried this combo? For a better experience, please enable JavaScript in your browser before proceeding. In this post, I've got some great highlights including the LEE . So if your goal is first-shot hits and you may shoot in a variety of conditions you should care about temperature stable powders. 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. Re: IMR 4166 in .223. You can find that here: http://precisionrifleblog.com/2016/06/19/powder-temp-stability-hodgdon-extreme-vs-imr-enduron/, Share the post "Powder Temp Stability IMR Enduron vs. H4350 and Varget". _gaq.push(['_setDomainName', '.accurateshooter.com']); I have had good luck with 4166 in .223 bolt rifles. It is the perfect burn speed for cartridges such as .308 Win, 7.62mm NATO, 22-250 Rem and 257 Roberts. IMR 7977 performs comparably to Hodgdon H1000 but charge weights are materially different. so I am thinking till powder does come available, load one or 2 levels under Max for a 223 into the 556 cases. In 2015, IMR will introduce three (3) new Enduron powders: IMR 4166, IMR 4451, and IMR 7977. 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. IMR 4955 is a medium burn speed powder, falling in between IMR 4451 and IMR 7977 in burn speed. Find load data for IMR 4166 Enduron propellant by clicking the button "Loads for this Powder".More about this powder:IMR End. To be able to use the full range of Shopware 6, we recommend activating Javascript in your browser. 4166 is the fastest burning powder, for cartridges like .223 Remington and .308 Winchester. Was able to find a node fairly quickly and with a little seating adjustment, it's shooting .3 moa or better. Versatility with uniformity and accuracy. (function() { Share the post "Powder Valley has new IMR 4166 Powder in Stock". h4895 Reduced Rifle Load. Case: Winchester; Twist: 1:12 inches; Primer: Federal 210M, Large Rifle Match; Barrel Length: 24 inches; Trim Length: 2.005 inches. IMR now offers four Enduron powders that cover a broad range of burn rates. Environmentally friendly - Enduron technology is environmentally friendly, crafted using raw materials that are not harmful to the environment. New customer? IMR 4166 performs well in the .308 Win (for bullets up to 175 grains) and in 6mm cartridges running the heavier (95-107gr) projectiles. ga.src = ('https:' == document.location.protocol ? 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. 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. IMR Enduron 4166 is a versatile, match-grade propellant, with the fastest burn rate in the Enduron line. var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; This propellant is ideally suited for many mid-range burn speed cartridges. This propellant performs comparably to Hodgdon H4831 but charge weights are materially different. Youll also find official load data in the Hodgdon 2020 Annual Manual. Really like this powder, the accuracy it produces is amazing I will lots more if I can find it. .223 Remington (Hodgdon Data Using IMR Powder) reloading data with 221 loads. When we are sold out, we are sold out. IMR is bringing out a new series of advanced-formulation extruded powders. I'm using this in my Tikka CTR 223 under 73 gr Berger BT target bullets. A Meopta MeoStar 1.710x riflescope was mounted to ensure an optimum sight picture. To be able to use the full range of Shopware 6, we recommend activating Javascript in your browser. 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. var _gaq = _gaq || []; This website uses cookies to ensure the best experience possible. Most powders arent specially formulated to be temperature stable. However, Alliants relatively new Reloder 16 is an extremely temp-stable powder, with a burn rate that is a close match to H4350. 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). IMR Enduron 4166 is a versatile, match-grade propellant, with the fastest burn rate in the Enduron line. Sounds familiar! The technology in IMRs Enduron line of powders provides four very important qualities that enhance both in-gun and downrange performance. 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. 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. 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. })(); To comment on a post, click Post Title or "Comment" Link. A versatile, match-grade propellant, IMR 4166 is comparable to Hodgdon Varget. Some of our Forum members have reported excellent results with IMR 4166 in cartridges that work with Varget, such as the 6mmBR, 6 Dasher, 6.547 Lapua, and .308 Win. Comprehensive load data for IMR 4166 Enduron reloading powder und technical specifications for this propellant. 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. When we are sold out, we are sold out. This demand lead to an incredible 2.5 billion pounds of smokeless propellants being manufactured by DuPont for Allied Forces in World War II. : (913) 362-9455; E-mail: [emailprotected]; Web: www.imrpowder.com, (Disclaimer: The loads described above were safe for this rifle, on this particular day. More about this powder: IMR Enduron 4166 is a versatile, match-grade propellant, with the fastest burn rate in the Enduron line. bolt reload data with 65gr. I have a pound of 8208 XBR for 223 development, haven't gotten round tuit yet. Share your experiences with other customers. With no pressure signs up to 45.8 grains of 4166 I decided to push further and see what I could get. IMR 4166 is one of IMRs Enduron family of propellants. This allows up to 4% more powder space in the case and in many loads yields more velocity than standard 7828. 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. This propellant performs comparably to Hodgdon Varget but charge weights are materially different. Find load data for IMR 4166 Enduron propellant by clicking the button "Loads for this Powder". IMR 4166 powder? For a better experience, please enable JavaScript in your browser before proceeding. When will Enduron powders appear on dealers shelves? This website uses cookies to ensure the best experience possible. IMR 7977 is the slowest burn rate Enduron Technology powder. The Rifle: Savage 10fcp, 24" 5r, accustock .308 Win, Vortex Viper PST 4-16 Target distance: 100 yards Shot off front and rear sand bags from a bench We continue to prioritize our shipments to our traditional sales channels to maximize powder availability at retailers. The first IMR reloading powders included ever popular favorites IMR3031 (1934), IMR4064 (1935) and IMR4350 (1940). 2. 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. 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. Shooters will find IMR 8208 XBR yields max velocities and 'tack driving' accuracy. 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. FPS low 2735 high 2789 In modern type guns, 4166 IMR Enduron Powder is a viable powder. 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). IMR 4166 possesses the fastest burn rate in the Enduron lineup. Sign up to get updates and access to exclusive promotions. 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. For info on other IMR powders, visit www.imrpowder.com. At 600 yds, the POI with 4166 loads was about 1.2 MOA higher than when using 43.2 gr. the accuracy is the same as varget but the velocity is a bit higher with a couple of 10ths less powder. 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). spitzer boat tail & imr 4166, .223 rem. 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. We need to get back to the good old days! We are engineers, reloading enthusiasts and operate one of the most powerful ballistics calculators. IMR 4166 possesses the fastest burn rate in the Enduron lineup. You are using an out of date browser. This ensured the powder charges were identical for each round of ammo. CL 2.005 Finally, Enduron powders are environmentally-friendly, crafted from raw materials that are not harmful to the environment. The rifle was placed on the 50 yard line and supported both fore and aft by sandbags. The folks at PrecisionRifleBlog.com meticulously loaded 6.547 Lapua ammo with each powder using some of the best equipment available. IMR offers a modern line of powders with Enduron Technology which is also marketed to have extreme temperature stability. It may be that if I did more load development I could close the gap. In fact, E. I. duPont arrived in America in 1800 determined to make an improved gunpowder and, by 1802, was producing gunpowder in a new plant along the Brandywine River in Wilmington, Delaware (this plant morphed into what is today the GOEX brand of black powder). The Hodgdon powder company is world renowned for introducing revolutionary technology to the reloader. These short-grain, extruded powders will deliver temperature insensitive quality while keeping copper residue to a minimum. Sounds familiar! The 4166 seemed interestingit matched my motorcycle jacket, but none of my reloading manuals had any data for it (it's that new). IMR now offers five (5) Enduron powders: IMR 4166, IMR 4451, IMR 4955, IMR 7977, and IMR 8133. 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. The 6.5 responded well to the precisely weighed powder charges in carefully prepared cases. I paid $159.00 for 8# Varget at Shooters last time I was up there. JavaScript is disabled. Shooters looking for readily-available alternatives to hard-to-find extruded powders should definitely check out the Enduron line-up. The weight of a kernel of 4166 was almost double the weight of a kernel of H4895, and they were clearly larger. They are suitable for a wide variety of cartridges, from small varmint cartridges all the way up to the .338 Lapua Magnum. The LabRadar is a new type of device that allows you to measure muzzle velocity within at least +/- 0.1% of the reading. The main features of the Enduron series are copper fouling eliminator, insensitivity to temperature changes, ideal loading density and being environmentally friendly. I've only seen a handful of load data for IMR 4166 and 223, it was 69 Sierra and 77 Sierra. Menu & Links 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. Good luck. IMR powder has long been a choice powder for knowledgeable reloaders. Powder Valley Inc. (PVI) and Midsouth Shooters both have plenty of IMR 4166 in stock right now. Find load data for IMR TrailBoss propellant by clicking the button "Loads for this Powder".More about this powder:Find load data for Accurate 5770 propellant by clicking the button "Loads for this Powder".More about this powder:Trail Boss was designed specifically for low-velocity lead bullets suitable for Cowboy Action shooting. Precision shooters will find an Enduron option well-suited to most popular precision cartridge types. The Enduron Technology powders are available in one-pound (1 lb) and eight-pound (8-lb) containers from quality reloading retailers. 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. Posted: 7/2/2021 8:19:25 PM EST. . 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. It may not display this or other websites correctly. Learn more about Enduron powders at www.enduronimr.com. 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. Across the board, the Enduron line is very insensitive to temperature changes, which is important for both match shooters and hunters. DuPont had historically been a major supplier of military propellants long before becoming one of the handloaders favorite powders. Villain Weapon Systems ATPIAL-C EFL -- Enhanced Class 3R Performance Available Now from TNVC! I did the usual load development testing and found that 43.0 gr. http://www.hodgdonreloading.com/data/rifle, Hoping to find a fat girl to slurp my eel, http://optimalchargeweight.embarqspace.com/, http://www.northeastshooters.com/vbse-a-little-help-with-target-analysis-for-OCW. First ladder turned out great! I'm using this in my Tikka CTR 223 under 73 gr Berger BT target bullets. Access from your Country was disabled by the administrator. ALL Bulletin content is copyrighted, 2023 AccurateShooter.com. Reviews can only be submitted while being logged in. Thanks, Posted by Phillip Jackson on Aug 1st 2021. IMR recently released a new line of powders with Enduron Technology which is also marketed to have extreme temperature stability. _gaq.push(['_trackPageview']); Share the post "Cant Find Varget for Sale? var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); IMR 7977 has the slowest burn rate among the Enduron Technology powders. . I bought all three. Then Try IMR 4166 Powder", A couple seasons back, PrecisionRifleBlog.com (PRB) published a significant field test of powder temperature stability. JavaScript is disabled. If you commonly use Varget, Alliant Reloder 15, Norma 203B, IMR 8208 XBR, or Vihtavuori N140, you might want to try IMR 4166. We do not take backorders and our Tech Services team cannot take orders via email or phone. Minuteman. 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. As with all load development, reference a credible reloading manual, then start at the minimum and work up in small increments. 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.. IMR 7977 is comparable to Hodgdon H1000. Cant find Hodgdon Varget on dealers shelves? The main features of the Enduron series are copper fouling eliminator, insensitivity to temperature changes, ideal loading density and being environmentally friendly. Choosing 4166, I decided to use it in place of my usual choice of Varget in a known accurate cartridge and rifle combination. OAL 2770 Sierra Case 5 rounds shot 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. Grab some at your nearest dealer, or for more information, contact IMR Powder Company; Tel. IMR 4451 is a mid-range burn speed powder, ideally suited for cartridges such as .270 Winchester, .30-06 and 300 Winchester Short Magnum. Enduron powders are formulated to reduce fouling and to be stable across a wide temperature range. Every week of WW II, as many munitions were used as in all of WW I. Copper fouling reduction these powders contain an additive that drastically reduces copper fouling in the gun barrel. _gaq.push(['_trackPageview']); Improved Military Rifle IMR 3031 Improved Military Rifle IMR 4064: 5.56 x 45 mm: Accurate 2495 VihtaVuori N135 VihtaVuori N140: Hodgdon CFE 223 Hodgdon H 335 Improved Military Rifle IMR 8208 XBR VihtaVuori N530 VihtaVuori N540: 5.6 x 50 Magnum: Improved Military Rifle IMR 4064 Winchester 748: 5.6 x 57: Improved Military Rifle IMR 4320: 5.7 x 28 . imr 4166 for sale .223, .223 loading data imr 4166, .223 rem. then consider IMR 4166. In today's shooting you can clearly see the scatter that centers at 45.5 and the obvious OCW at 46.2. The main features of the Enduron series are copper fouling eliminator, insensitivity to temperature changes, ideal loading density and being environmentally friendly. Great stuff! From the 17 Remington to the 243 Winchester to the 375 H&H Magnum, accuracy and performance are excellent. 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. First, these powders all feature chemistry that reduces copper fouling. $182.75. ARCHIVED. Loading density is perfect for the very large magnums, including the 6.5mm and 7mm magnums. (The only two .45-70's I own are trapdoor Springfields.) it's a bit bulky when pouring into the 223 case. 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. Cant Find Varget for Sale? For this reason, the IMR brand powders truly are Legendary products. VAT (where applicable), shipping costs and possible delivery charges. Hodgon VARGET, IMR 3031, IMR 4064, IMR 4166 Enduron, IMR 4831, IMR 4895, Lovex D073.6, Lovex S060, . The new powder line-up comes in three flavors: 4166, 4451 and 7977. Other than that , great job, thanks. ALL Bulletin content is copyrighted, 2023 AccurateShooter.com. IMR recommends always consulting www.IMRReloading.com for the most accurate, up-to-date data. bolt reload data with 65 gr. This is a true magnum propellant yielding outstanding performance in .300 Winchester Magnum, 7mm Remington Magnum and .338 Lapua Magnum. Third, Enduron powders are designed for optimal load density. Full Member. I have heard the same criticism from other forum members. Reloading 223 Rem./5.56mm is mostly the usual routine. This powder is comparable to Hodgdon H4350. For more information and IMR 4166 LOAD DATA visit imrpowder.com or check the 2015 Hodgdon Annual Manual. of Varget. 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. Loading density is perfect for magnums, contributing to superb uniformity. It is the perfect burn speed for cartridges such as .308 Win, 7.62mm NATO, 22-250 Rem and 257 Roberts. It's been over two years of this ammo & reloading nightmare. Is there a different load data site? The technology in IMRs Enduron line of powders provides four very important qualities that enhance both in-gun and downrange performance. Tag: IMR 4166 Loading for the AR-15 with the LEE Auto-Drum Powder Measure. I've had good luck with 8208 with 77gr SMK's and 69gr Nosler Competition Customs Hoon Rating - 100% 1 0 0 Joined Mar 2, 2013 Messages works great in many cartridges with good to great accuracy. Plain cartridges, in contrast, turned in an average extreme spread of 51 fps. 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. The 223 is the most common round. 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'm very happy with this powder. OAL 2770 Sierra Case 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.. The IMR brand was first introduced under DuPont in the 1930s. VISIT THE RDC WHITE HOTS White Hots 50/50 is a 50 Caliber, 50 grain pellet for muzzleloaders. * All prices incl. $40.99 - $270.99. Anyway, I like the 4166! when enduron works it is often same hole shooting. In rifles, this powder delivers excellent velocity and accuracy in such cartridges as the 22 Hornet and 221 Fireball. 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 went online and found data published by the manufacturer, so I worked with that for my 30 06.