RCBS #14. I'll check with him and PM you if you dont mind. Went to Cabela's Saturday and scored 100 rounds of Hornady 285 grn BTHP. JavaScript is disabled. * All prices incl. The COAL stated is this table is according to the SAAMI specification. DuPont founded the company. For this reason, the IMR brand powders truly are Legendary products. I picked up some IMR 7977 to try some different bullet/powder combo's but I'm not finding much data. Hodgdon Powder Company operates following Biblical principles to honor God. More about this powder: IMR Enduron 7977 is a slower burn rate in the Enduron family. 338 lapua 250 grain BTHP. I love Hodgdon, but I think 97gr is dangerous in most 250 class bullets. IMR Enduron 7977 is a slower burn rate in the Enduron family. .300 win mag imr 7977, 168 grain berger 7mm rem mag with 7977 powder, 26 nosler with imr 7977, 280 ackley improved with imr 7977 data and 168 berger . Cedar Park, Texas. Scenar-L has truly earned its . Thanks, but I prefer shooting .300 Bergers. . It may not display this or other websites correctly. This is a true magnum propellant yielding outstanding performance in 300 Winchester Magnum, 7mm Remington Magnum and 338 Lapua, among other cartridges. I was wondering if the latest version of Quick load could work up recommended loads for the 338 Lapua using the Cutting Edge 252 gr. For a better experience, please enable JavaScript in your browser before proceeding. Vihtavuori N550 - powerful loads for hunting. these would be considered max powder charges . For more information, go towww.P65Warnings.ca.gov. Find load data for IMR 7977 Enduron propellant by clicking the button "Loads for this Powder". I am finally starting to play around with different loads for my .338 Lapua. 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. Reloading- What pressure signs do you stop at. When will it be back in stock? It yields outstanding performance in such cartridges as the 300 Winchester Magnum, 7mm Remington Magnum, 338 Lapua and a host of others. Loading density is perfect for magnums, nicely filling the case at maximum charges, contributing to superb uniformity and accuracy. Consistent performance . Loading density is perfect for magnums, contributing to superb uniformity. Reply. Lyman #38. They're all having good results. Improved Military Rifle IMR 7828 SSC. Posted by marcus john tweddell on Mar 3rd 2021. have used this powder in a .270 wsm useing the Hornady 150 grain SSTwith the exact load as HODGDON recomends and found it accurate and takeing large red deer out to 500 meters with ease. 26. Magnum, .300 Wby. It is the perfect burn speed for cartridges such as .308 Win, 7.62mm NATO, 22-250 . You are using an out of date browser. Loading density is perfect for magnums, nicely filling the case at maximum charges, contributing to superb uniformity and accuracy. 26.0 inch = 660.4 mm Predicted Data for Indicated Charges of the Following Powders. Loading density is perfect for magnums, contributing to superb uniformity. That's suprising. I'm not very computer savy , so if I can figure out how to use it , anyone can . *Recommended Powder C Compressed Load 2 . Berger Elite Hunter & 285 gr. The 6.5 mm Creedmoor (top.) IMR Enduron 7977 is a slower burn rate in the Enduron family. We place limited powder inventory for sale on a regular basis on our website. The length of the neck is just about one bullet diameter at 0.329 inch. In the Hodgdon manual it has the best velocity in a 338 Lapua of any of the powders they tested at 93g at 2688 fps. We are engineers, reloading enthusiasts and operate one of the most powerful ballistics calculators. to 90 gr. Improved Military Rifle IMR 8208 XBR. This is a true magnum propellant yielding outstanding performance in 300 Winchester Magnum, 7mm Remington Magnum and 338 Lapua, among other cartridges. For the 338 Lapua, the 300 grainers are too heavy and IMR 8133 is too slow. JavaScript seems to be disabled in your browser. Lee #5. . This testing was with Hornady 285 ELD-M with Alliant Reloder 26. Address: xxl-reloading.com, Gartenweg 9, 83661 Lenggries, Germany. I used a 26" bbl , my rifle has a 30" bbl . Ammunition. Near Maximum ! US869 is a dense propellant that allows the shooter to use enough powder to create maximum velocities in cartridges such as the 7mm . just to show how easy you can gather this info I ran a 338 lapua with a 300 berger elite hunting bullet . calibers in the late 90's. The N550 is an ideal fit for many of the 30 caliber magnums with lighter bullets, but also useful across a wide range of bore sizes in various shooting disciplines. Bullet: Nosler BST 200 gr: Bullet weight: 13 g / 200 gr: B.C: 0.414: C.O.L: 92.0 mm / 3.622 # 33200: Gunpowder Charge Weight Velocity m/s Velocity fps; Norma MRP: . I have 4 shooting buddies that run RPR's. The IMR series of handloading powders were the only choice to wring full performance out of rifle calibers. Inkognito. We place limited powder inventory for sale on a regular basis on our website. I recently bought one each of these powders to try in my 300 win mag and my 6.5 x 47 lapua. IMR is a brand in the Hodgdon Powder Company lineup. imr 7977 load data 338 lapuathe renaissance apartments chicago. Submitted Loading Recipes Show all Submitted Loading Recipes Tipstrike Experiment in 7x66 Vom Hofe Preparing 204 Ruger Norma Brass . I myself have been shooting Sierra 300gr with H1000. In addition to the 6.5x55 mm Swedish, the Sauer 404 is chambered in 15 other . They are suitable for a wide variety of cartridges, from small varmint cartridges all the way up to the .338 Lapua Magnum. IMR recommends always consulting www.IMRReloading.com for the most accurate, up-to-date data. Improved Military Rifle IMR 8133. It'll generate more velocity but it shoots well at 2800. Warning! Load Specifics. We continue to prioritize our shipments to our traditional sales channels to maximize powder availability at retailers. mdslammer Sergeant. Hope it helps. Loading density is perfect for magnums, nicely filling the case at maximum charges, contributing . I did see Hodgdons data, but unfortunately they only list the hornady SP bullet. Reactions: Evlshnngns. 338 lapua 250 grain BTHP. Comprehensive load data for IMR 7977 Enduron reloading powder und technical specifications for this propellant. Imr 7977. Good luck with the new set up. Keying in on the PRC's role as a big-game cartridge, I concentrated on loads with high-BC bullets. I paid about $160 for it originally , and have bought many updates over the years . @3000 fps. US 869. Minuteman. No reviews found. Loading density is perfect for magnums, contributing to superb uniformity. 338 Lapua Mag - 265 grain Version 9.0 24" H-S Prec. I had been using Hornady 250grn BTHP and have been unable to obtain. IMR Enduron 7977 is a slower burn rate in the Enduron family. After barrel break-in, I ordered up a set of custom whidden dies and started loading the following: Bullets: 300 gr. DuPont had historically been a major supplier of military propellants long before becoming one of the handloaders favorite powders. Loading density is perfect for magnums, nicely filling the case at maximum charges, contributing to superb . online shopping has now taking into account a long way; it has untouched the quirk consumers and entrepreneurs reach issue today. This website uses cookies to ensure the best experience possible. Thanks fellas. IMR 7977 is comparable to Hodgdon H1000. If anybody would like to share their load data using IMR 8133, I would be very grateful. . I was amazed at the velocity witch was more that I was supposed to get with 71 grains. Enduron Technology extruded powder with the slowest burn rate, IMR 7977 in stock now for sale online near me, is a true magnum cartridge propellant. Any gunpowder required by handloaders can be sourced through these brands. I set it for a 105% max case fill , and set it for the max rated pressure of 60916 psi . Ramshot Hunter. Powders include IMR, Hodgdon, Winchester I wouldn't say it's a better alternative - it's on the slow side. Just tagging in, I'm curious what folks say about 7977. for a 338 lapua RL33 is going to be hard to beat . I have had good luck with 4451 in 6mm Rem with 90 gr BT and 7mm Rem Mag with 150 BT. 2796 88.0 * 2712 86.0 2628 H1000 93.0 MAX. if anyone is interested i did the same process with the IMR 4451 powder in my 6.5x47 lapua for which there is no published data for this powder. With 285 ELDs I hit hard lift at 91 grain. Predicted Data for Indicated Charges of the Following Powders. The slowest burn rate Enduron Technology extruded powder is IMR 7977, and is a true magnum cartridge propellant. The Scenar-L has the refined qualities of the original Scenar bullet with higher standards of jacket wall concentricity, weight variation and dimensional uniformity. Any help and/or guidance would be much appreciated. In this video we discuss reloading the Savage 110 BA stealth in 338 Lapua Magnum. IMR 7828SSC 93.8 3201 104.3C 3583 *Magnum 104.6 3336 116.2C 3670 338 Lapua Magnum Suggested Bullet Use 185-grain TTSX BT Sectional Density .231 Ballistic Coefficient .432 C.O.A.L 3.600" uggested ullet se Suggested Bullet Use Maximum Loads Should Be Used With Caution - Always Start With Minimum Loads. have used this powder in a .270 wsm useing the Hornady 150 grain SSTwith the exact load as HODGDON recomends and found it accurate and takeing large red deer out to 500 meters with ease. VihtaVuori N150. here is the powder chart . To comply with the new e-Privacy directive, we need to ask for your consent to set the cookies. It hasn't wiped out the idea of shopping in a being store, but it gave the consumers an swap means to shop and a better announce that . JavaScript is disabled. In 2003, Hodgdon Powder Company acquired the IMR brand bringing these prestigious powders under the umbrella that also includes Hodgdon, Winchester and GOEX. Loading Data . IMR 7977 Enduron 109.2 77.7 5.03 2708 89.3 60000 8519 1.264 ! One of the guys may want it. This is a true magnum propellant yielding outstanding performance in 300 Winchester Magnum, 7mm Remington Magnum and 338 Lapua, among other cartridges. YMMV. Sign up to get updates and access to exclusive promotions. I just bought the newest update Dec 2016 , it cost about $22 shipped to my door . Mark . IMR is an acronym for Improved Military Rifle. forum.accurateshooter.com/threads/imr-7977-in-338-lapua.4021835/, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.5060.114 Safari/537.36 Edg/103.0.1264.49. IMR Enduron 7977. 7977 IMR Enduron Powder; 4166 . IMR Enduron 7977 is a slower burn rate in the Enduron family. It is slower burning than expected. Hogdon's 2015 annual load manual has data and some good articles on them. for stuff like this it is worth double the price . Regarding primer choice for the .300 Norma Magnum, you'll most definitely want a good large rifle magnum primer to ignite that powder column, especially since powder charges can exceed 90 grains. Ramshot Hunter. To comply with the new e-Privacy directive, we need to ask for your consent to set the cookies. Pushing 163gr SCBT 3611 fps (avg.) Using bullets from Barnes TTSX, Barnes TSX, Speer SP, Nosler Part, Sierra SPBT, Hornady SP, Barnes TTSX BT, Swift SP, Sierra HPBT. The IMR Enduron Powder load data published by this website is intended discussion . IMR 8133 IMR Enduron 8133 is the slowest burn rate in the Enduron family. New Products. IMR recommends always consulting www.IMRReloading.com for the most accurate, up-to-date data. Works great in a 7mm Remington Magnum cartridge out of a Winchester Stainless Model 70 using 136 gn Hammer (sledge hammer) bullets. Only did a velocity check on back behind the garage. Ok, but just to give you some perspective You must log in or register to reply here. Sign up to get updates and access to exclusive promotions. IMR 7977 performs comparably to Hodgdon H1000 but charge weights are materially different. I use 98 grains in a 31" 300 RUM. I got a buddy in FL that's about due for a barrel change. Loading density is perfect for magnums, contributing to superb uniformity. Loading density is perfect for magnums, nicely filling the case at maximum charges, contributing to superb . VAT (where applicable), shipping costs and possible delivery charges. Shellholders: Hornady #43. Took a while but finally have all the components to reload my 338 Lapua Mag. Hey guys, does anybody have any IMR 7977- 338LM data? Reloading- What pressure signs do you stop at. 2825 91.0 * 2754 89.0 2684 . Im hoping to try 250gr berger EH, 285eld-m, and 285 BTHP. A true magnum spherical rifle powder, it is superb with heavy bullets in big, overbore rifle cartridges. Loading density is perfect for the very large magnums, including the 6.5mm and 7mm magnums. snoopy happy dance emoji 8959 norma pl west hollywood ca 90069 8959 norma pl west hollywood ca 90069 The first IMR reloading powders included ever popular favorites IMR3031 (1934), IMR4064 (1935) and IMR4350 (1940). IMPORTANT: Please view the special notes by clicking here. MTH ( standard, not single feed version. Have new brass, Hornady, and primers . Just for comparison's sake, the 338 Federal will send a 215 grn bullet out at 2500 fps, the 338-06 . with a shortened case body. Ive been working on trying to get my 338 to shoot better. Shellholders: Hornady #5. Ramshot Big Game. 8. In doing so, we deal with integrity and honesty . is essentially the 6.5 mm Swede (btm.) We offer a wide variety of cases and bullets for hunting, sport shooting, target and tactical purposes. I've been working on trying to get my 338 to shoot better. Loading density is ideal for magnums, filling the case nicely at . These loads were shot by Brian Pearce of Wolfe Publishing Co. IMR 4831 92.4 72.7 4.71 2519 100.0 60916 8941 1.444 !DANGEROUS LOAD-DO NOT USE! For the 338 Lapua, the 300 grainers are too heavy and IMR 8133 is too slow. For the best experience on our site, be sure to turn on Javascript in your browser. Charge weights are nearly identical to H1000, which i understand 7977 is supposed to be similar too. The store will not work correctly in the case when cookies are disabled. Ordered a LRI barrel after giving up. I've had good success with 7977 in the 338 Lapua with 300g Bergers. Bottom line, I like it so far. But I agree with the above post. Really consistently accurate results. Bullet Weight: ALL. .338 Lapua Magnum (using Sierra bullets) Warning! Please help us to improve and report any suggestions via our contact form. Subscribe to the free newsletter and do not miss any news or promotions. These loads were shot by Brian Pearce of Wolfe Publishing Co. The Hornady 143-grain ELD-X, Nosler 142-grain ABLR, Berger Classic Hunter, and Berger Hybrid Target bullets all . Most of my guns will not shoot a tight group without some. I have H1000 which I have tried with no luck. it takes all the guess work out of the "what if " questions we reloaders have . 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). Reviews can only be submitted while being logged in. Loading density is perfect for magnums, contributing to superb uniformity. . Hey guys, does anybody have any IMR 7977- 338LM data? Jim, I understand this is an old thread, but want to reply anyway. Founded by Frank Galli in 2000, Snipers Hide has been offering informational videos, podcasts, and other support to its users in one location. Joined Jan 8, 2012 Messages 7 Has any one tried this powder with any luck? We do not take backorders and our Tech Services team cannot take orders via email or phone. It performs admirably in cartridges such as the 300 Winchester Magnum, 7mm Remington Magnum, 338 Lapua, and a variety of others. Each of these are still favorites with handloaders today! . Please enter your login details below. He's not a precision guy and only shoots to 600. New customer? Sign up with your email address to receive news and updates. for a 338 lapua RL33 is going to be hard to beat . I too am interested. Yields outstanding performance in such cartridges as the 300 Winchester Magnum, 7mm Remington Magnum, 338 Lapua and a host of others. 8mmmaghunter Member. either expressed or implied is assumed for the use of this data. During this time of overwhelming demand, our team is doing everything possible to produce more bullets and ammo than ever before. I love it! Loading density is perfect for magnums, contributing to superb uniformity. I dont have any velocity data, but I did run a couple loads with . I had no luck with my factory RPR barrel. 7977 uses almost exactly the same data as H1000 with very similar speeds. It may not display this or other websites correctly. Sierra SBT COAL: 3.575 inches; Sierra HPBT MatchKing COAL: 3.680 inches. . Be the first to share your insights. The Best Hunting Bullets for the 338 Lapua Mag. This demand lead to an incredible 2.5 billion pounds of smokeless propellants being manufactured by DuPont for Allied Forces in World War II. This is a true magnum propellant yielding outstanding performance in .300 Winchester Magnum, 7mm Remington Magnum and .338 Lapua Magnum. Full Member. Let me know if you want to sell the barrel. RCBS #48. Resources. IMR Enduron 7977 is a slower burn rate in the Enduron family. N. ntg . Blog. .338 Lapua Magnum - Published Manufacturer Loading Data. We continue to prioritize our shipments to our traditional sales channels to maximize powder availability at retailers. Two are 338 LM. You are using an out of date browser. then I can get a powder chart from fastest velocity to slowest velocity . The COAL is measured from the base of the case to the tip of the bullet. The 33 Nosler case holds 88.3 grains of water. 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. I understand this is an old thread, but want to reply anyway. It is recommended for the .25-06, 6.5mm-284, 7mm Rem. This is a true magnum propellant yielding outstanding performance in 300 Winchester Magnum, 7mm Remington Magnum and 338 Lapua, among other cartridges. IMR 7977 performs comparably to Hodgdon H1000 but charge weights are materially different. I searched for RL 33 yesterday and they didn't have any, nor Retumbo. 1. (Please refer to out " Reloading Tips " for proper measurement techniques) If possible, we recommend that you determine the COAL of your rifle, and load your bullets at 1mm short of the lands. This is a true magnum propellant yielding outstanding performance in 300 Winchester Magnum, 7mm Remington Magnum and 338 Lapua, among other cartridges. if you're serious about reloading and shooting I really recommend it . Some 7977 load data here. We appreciate your patience and continued support! SUBSCRIBE TO OUR NEWSLETTER TO STAY UP ON THE LATEST. For a better experience, please enable JavaScript in your browser before proceeding. 56.0 grns behind a 100gr NBT got me 0.5" at 100 with 3156 f.p.s. Really consistently accurate results. I tried 250gr Bergers and 7977 in a pressure test. IMR 7977 90.0 MAX. To put that in perspective, the 338 Win. With H1000 being harder to find recently I am going to try the 7977 with both the 300Gr and some 250Gr Bergers. Ac c uB ond Lo n g R an g e 0 .7 3 2 IMR 4166 possesses the fastest burn rate in the Enduron lineup. It may not display this or other websites correctly. For powder I like IMR 7828 and scored 2 lbs of the IRM7828scc. Lapua FMJ: 2856.44: Consistent: 45 grains 4166: 123 gr. The main features of the Enduron series are copper fouling eliminator, insensitivity to temperature changes, ideal loading density and being environmentally friendly. March 27, 2016 Gavin Reloading Blog, Uncategorized 308 Winchester, 338 Lapua, AR-10, AR-15, Gunpowder, IMR 4166, IMR 4451, IMR 4955, IMR 7977, IMR Enduron Ultimate Reloader Moves to the Country Anyone that lives in the city can tell you just how difficult, limiting, and expensive shooting can be when you don't have access to the country. Snipers Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. I hope this shows how valuable quickload can be . The maxorder quantity of any powder SKU is. Consistent performance . More what I was meaning is I think 97 grains of 7977 with 250 grain bullets may be dangerous in bullets other than the 250gr hornady soft point. hope this helps . Imr 7977 Load Data For 338 Lapua If you are looking for Seeley Imr 7977 Load Data For 338 Lapua Yes you see this. Bullets. 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. .338 Winchester Magnum - Published Manufacturer Loading Data. imr 7977 for sale IMR powder production dates back more than 200 years, when E.I. The IMR brand was first introduced under DuPont in the 1930s. Founded by Frank Galli in 2000, Snipers Hide has been offering informational videos, podcasts, and other support to its users in one location. You are using an out of date browser. It yields outstanding performance in such cartridges as the 300 Winchester Magnum, 7mm Remington Magnum, 338 Lapua and a host of others. Thread starter jmden; Start date Feb 1, 2015; Feb 1, 2015 #1 jmden Well-known member . Magnum, .300 Win. With 7977 I discern no difference between CCI 250 or Fed 215 . It may not display this or other websites correctly. 14 rds from my 338 Win Mag Rem 700 XCR. Magnum and .338 Lapua. IMR Enduron 7977 is a slower burn rate in the Enduron family. JavaScript is disabled. The main features of the Enduron series are copper fouling eliminator, insensitivity to temperature changes, ideal loading density and being environmentally friendly. With the bullets touching the lands 69 grains gave me an average velocity of 3140 ft/sec.. . We do not take backorders and our Tech Services team cannot take orders via email or phone. Gun: Savage Model 110 BA; Barrel Length: 26 inches; 1-in-9-inch twist; Case: Lapua; Primer: Federal 215 Large Rifle Magnum; Bullet Diameter: .338 inch; Maximum COAL: 3.681 inches; Maximum Case Length: 2.724 inches; Trim to Length: 2.714 inches. Cabelas in Wheeling had the new powder in stock last Saturday. This is a true magnum propellant yielding outstanding performance in 300 Winchester Magnum . Works great in a 7mm Remington Magnum cartridge out of a Winchester Stainless Model 70 using 136 gn Hammer (sledge hammer) bullets. Access from your Country was disabled by the administrator. I shot five rounds and at 100 yards and I got a group that was less than 3/4 of an inch. Warning; Manufacturer Loading Data; Cartrige Powder Recommendations; . I tried H1000, IMR7977, and 4891 with 4 different bullet combos. IMR 7977 Enduron . here is the Data I found of Hodgdon's site. Lapua's Scenar-L bullet is the result of decades of experience and state of the art manufacturing capabilities combined with extensive testing. Loading density is perfect for magnums, nicely filling the case at maximum charges, contributing to I tried 7977 and H1000 without much luck, finally settled on Retumbo with the 285gr ELD-Ms. It seemed to me Hodgdon was more aggressive with the max load when comparing to other loads and in my case is sure was. I have not ran 8133 in 338 yet. . To be able to use the full range of Shopware 6, we recommend activating Javascript in your browser. I sure wouldn't want to do without it . IMR recommends always consulting www.IMRReloading.com for the most accurate, up-to-date data. I picked up some IMR 7977 to try some different bullet/powder combos but Im not finding much data. You must log in or register to reply here. IMR 7977 for the 300 win mag . It's hard to pick favorites, but for powders, IMR 8133 was a standout with almost all loads tested in my rifle. Share your experiences with other customers. holds 78.6 grains of water, which means the Nosler has a 12 percent increase in case volume while maintaining the same 3.340-inch overall cartridge length. I'm using RL33 with 300 gr berger hunting bullets . . I've had quickload since 2009 , I think . 160 gr. Trail Boss Reduced Rifle Load. The .300 Norma case has a capacity of 103.0 grains of water, so powder charges will approach 90 grains or more, depending on the bullet weight. Every week of WW II, as many munitions were used as in all of WW I. SAAMI . Cartridge Comparisons. Supersubes Heathen. I hit Harold bolt lift around 93gr. Loading density is perfect for magnums, nicely filling . The IMR series of powder is trusted by reloaders all over the world and is suitable for a wide range of reloading applications. Loading density is perfect for magnums, nicely filling the case at maximum charges . it should give the highest velocity without showing signs of over pressure . it should give the highest velocity without showing signs of over pressure . I am starting with the 250 gr bullets and according to Sierra's load data, my range is from 82.1 gr @2750 fps. The IMR brand was created under the DuPont Corporation. For a better experience, please enable JavaScript in your browser before proceeding. The slowest burn rate Enduron Technology extruded powder is IMR 7977, and is a true magnum cartridge propellant. Find load data for IMR 7977 Enduron propellant by clicking the button "Loads for this Powder". so as always start low and work up . Snipers Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. Thank goodness we do not have a .338 Lapua, as Jim's shoulder would not handle the punishment! Be Alert: Publisher cannot be responsible for errors in published load data. Hornady ELD-M; Primer: 215M; Brass: Lapua; Powders: H1000 & IMR 7977; I have messed with seating depth loading all the way up into the lands and then backing my bullet out all the way to thirty . Have been looking at the 7977 for my 270 with the Matrix bullets. https://www.snipershide.com/shooting/threads/new-338-lm-loads.6955101/. IMR 7977. CHEAP IMR 7977 AVAILABLE IN STOCK. Improved Military Rifle IMR 7977. Matching Maximum Pressure: 60916 psi, or 420 MPa . Mag. 123 gr. 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. Just couldnt get under 0.8 moa. Reduced Rifle Loads. Lee #25. Retumbo was 94g at 2654fps. WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. When we are sold out, we are sold out. For a better experience, please enable JavaScript in your browser before proceeding. Ill be going to 338 LM AI and shoot 300gr Bergers. 338 Lapua Magnum; 338 Remington Ultra Magnum; 338 Winchester Magnum; 338-06 A-Square; 338-378 Weatherby Magnum; 340 Weatherby Magnum; 35 Whelen; 350 Remington Magnum; 375 Flanged; 375 H&H Magnum; 375 Remington Ultra Magnum; 375 Weatherby Magnum; 378 Weatherby Magnum; 40 S&W; 404 Jeffery; 416 Remington Magnum; 416 Rigby; 45 Auto (ACP) 450 Rigby . Improved Military Rifle IMR 7977. The main features of the Enduron series are copper fouling eliminator, insensitivity to temperature changes, ideal loading density and being environmentally friendly. I get 2800 fps with a 300g Berger in my 30 inch barrel. .338 Lapua Magnum (Hodgdon Data) reloading data with 170 loads. Find A Dealer. This is a true magnum propellant yielding outstanding performance in 300 Winchester Magnum, 7mm Remington Magnum and 338 Lapua, among other cartridges. . IMR 7977 powder is a magnum propellant with the slowest burn rate of the Enduron powders.