IMR 4227 - 300 BLACKOUT anyone use it? Rather than having a steep shoulder and overbore case, like the 20 Vartarg (a 221 Remington necked down to 20 caliber), it has a relatively straight design that requires fast magnum pistol powders. Groups were 5 shots (unless otherwise indicated) at 100 yards. It is a very accurate powder. 30/40 Krag. 300 H&H Mag. 308 Mar Exp. All Reloader Gear. The targets above represent the loads shown in the table. 30-06 Sprg Ack Imp. .300 AAC Blackout - Manufacturer Loading Data. All shooting was done prone, from a bipod with rear bag. On some guns, the short case can simply snap out from under the extractor if using a constant tension spring type ejector. 6.5 Creedmoor load development: Sierra 130 grain Tipped MatchKing (TMK) with H4350, Varget, Reloder 15 and Reloader 17, Introduction I cut back a 28″ barrel 308 Winchester one inch at a time, to 16.5″, and recorded velocity data for four different cartridges. The short case length doesn’t necessarily effect feeding, since the bullet of the loaded cartridge is similar in length to the 223 Remington, but it can make ejection difficult from many bolt action rifles. .300 Blackout/.300 Whisper.300 H&H Magnum.300 Norma Magnum.300 PRC.300 Ruger Compact Magnum.300 RUM.300 SAUM.300 Savage.300 Weatherby Magnum.300 Winchester Magnum.300 … Pistol; ... ALL Accurate 1680 Accurate 4100 Accurate 5744 Accurate LT-30 Accurate No. Also note when examining published materials you will find a wide range of loads that are deemed safe. Reading a few different reports of accuracy issues with the cartridge in general (you’ll notice many of the sub sonic groups published online are shot at 25 yards!- more on this later), I came to the realization, that most of the “good” groups found with the cartridge were shot with either a special chamber (not a 300 BLK which has a long throat to accommodate the heavy bullets) or a slower twist rate to work well with the light bullets (SAAMI specifies a 1:8″ twist, click link). Like all other “Hornet powders” introduced after 2400 and IMR-4227, both were primarily designed for other purposes; 300-MP for magnum handgun cartridges and CFE BLK for the .300 AAC Blackout. 30 Caliber.310” Diameter. Lee Press, Lee Mold, IMR 4227 adjustments are sometimes necessary to cycle in different length gas systems with or without suppression. The case manufacturer, Nosler or Jagemann (JAG), is listed on the table below. Shooting a 100 or 120 grainer with only 3 to 4 grains of fuel makes the outfit sound like a 22LR. Maybe its because Im running a bolt that is very finicky. 30-378 Wby Mag. Bill Marr June 1, 2016 Bill Marr 300 BLK, Cartridge Selection, Reloading 0. I've used: H110, IMR 4227, Lil' Gun, IMR4198 in 300 BLK supers & subs Did some testing Thurs. At the other end of the spectrum, the small case capacity invites downloaded ammo. Known for its ability to deliver heavy subsonic bullets for standard AR magazines while cycling the action in suppressed applications, it also works well with lighter supersonic loads, offering a similar external ballistic performance to the 7.62x39mm Russian (check out my 300 AAC Blackout Review from September 2012). Nosler Ballistic Tip 125-grain. As I’m sure you noticed, some powders handle a … Magnum pistol seems to be the primary use and that doesn't interest me. Sorry, your blog cannot share posts by email. The 1:7 twist worked fairly well with the heavier, 220 SMKs, with groups ranging from 1.082-1.477 MOA. If you have a bunch of other .300 Blackout guns//pistols in your arsenal, it might be a better idea to opt for the 8 lb container. While it is has similarities to the Savage Model 10/110, features of the Axis are geared toward selling the rifle for […], 6.5 Creedmoor 16.5″ barrel load development for the 123 grain Sierra MatchKing (SMK) and 140 grain Sierra MatchKing (SMK) When I rebuilt my Savage 10 FCP-SR into a custom 6.5 Creedmoor, I settled on a […]. 300 Blackout 208 GR HDY A-MAX IMR IMR 4227 .308" 2.260" 9.8 1,041 25,800 PSI 300 Blackout 208 GR HDY A-MAX Winchester 296 .308" 2.260" 9.2 1,060 22,700 PSI 300 Blackout 220 GR SIE HPBT Hodgdon CFE BLK .308" 2.260" 12.1 1,060 18,200 PSI The design of the cartridge itself is a bit of an issue as well. You can probably go up to 11 grains and still be OK. [ARCHIVED THREAD] - IMR 4227 300 blackout … H-110 for super sonic, AA-1680 for sub sonic. .300 Whisper / .300 AAC Blackout / .300 Blackout (Hodgdon Data) reloading data with 73 loads. I've come across a good bit of IMR 4227 and have started loading for the 300 BO. The loads shown below are only considered safe in the test gun! In 44 mag it does well, but the powder is just bulky enough that the case needs to big a tad larger. All information is provided "as is" with all faults without warranty of any kind, either express or implied. I set up a different lower for a CCMG 22LR with no problem. The target was a 2″ orange dot printed on paper. Consult appropriate load manuals prior to developing your own handloads. IMR-4198, 11.0gr-10.0gr no data due to looking like a shotgun blast IMR-4227 no data due to looking like a shotgun blast. elvis ammoGuns and gear. 308 Win. In closing, my experience with sub 300BO has been a ride, but dont get discouraged. All content Copyright 1998-2018 Rifleshooter.com, FTC disclosure: some links on this site are monetized. Unlike many .300 Blackout powders in the market, the IMR Powder Smokeless Powder’s biggest feature is on the name itself. Even as a 2nd or 3rd choice powder? Powders include IMR, Winchester, Hodgdon CAST SUBS 300 BLK OUT 300 blk subsonic 230 grn. Thread Status: Not open for further replies. Examining the table above, note the wide range of accuracy, velocity and standard deviation achieved with the different loads. You want a smokeless powder. By cross referencing the group size shown on the target with the group size in the table, you can determine which group was shot by which load. June 1, 2016 Buyers and users … Alliant 300-MP is slightly slower burning than Lil’Gun, and CFE BLK … The data was summarized in 308 Winchester / 7.62x51mm NATO: Barrel Length […], The Savage Axis (originally branded the Savage Edge) is a budget rifle with a strong following. 4227 is a good powder, works best with mild compression. In order #63 - Lil' Gun, H110, WW296, IMR 4227, H4227. Let me try again, IMR-3031 is too slow burning of a powder for 300 Blk. 7.62x39. Here is a look at my 300 Blackout load development using the Lee hand press and IMR 4227 powder. 8mm Caliber.323” Diameter. I loaded these projectiles with IMR 4227 powder to the higher … 300 Blk. Never miss a post! 300 AAC Blackout Test Specifications/ Components ... IMR 4227 18.1 19.5 H4198 19.2 20.0 IMR 4198 11.8 19.1 19.9 CFE BLK 21.1 22.2 23.4 Trail Boss 5.6 Energy/ft.lbs 269 882 977 1077 1182 1292 1407 INDICATES MAXIMUM LOAD - USE CAUTION LOADS LESS THAN MINIMUM CHARGES SHOWN ARE NOT RECOMMENDED. You will like this product if. 300 Rem SA Ultra Mag. I know AAC says H110 is the go to powder, but Hodgdon has IMR 4227 as an option. I explained to him he wouldn’t really have a 300 BLK anymore. & Fri. All tests done w/ 8.5" barrel AR pistol; Ranier Ballistics 180 gr. The rifle, as pictured above, includes the following parts from Brownells: For testing and evaluation purposes, I used 125, 135, 175 and 220 grain Sierra MatchKings (left to right in photo below) over H110 and IMR 4227 powders. Loading 300 Blackout - ep 11 - More subsonic tests with Accurate 1680, IMR-4227, and Lil' Gun Note: In the target above, the groups labeled “6.5 123” were shot with a 6.5 Creedmoor and are not relevant to this post. Prior to building a custom bolt action rifle in 300 BLK I did a lot of homework on loads and load development. As far as twist rate is concerned, I wanted the flexibility of being able to shoot the light and heavy rounds, so I ordered a custom barrel from Bartlein with a 1:7″ twist. The 300 AAC Blackout should fit as well as the key item is the magazine and it uses 223 magazines. 6.5 Creedmoor load development: 16.5 inch barrel, 123 SMK and 140 SMK, Remington 870 extractor identification: MIM v. bar stock, 6.5 Creedmoor H4895 reduced loads: 123 SMK and 142 SMK, Ruger 10/22 custom barrel work: Cut, crown, thread and fill sight dovetail, VTAC L.U.S.A. Most of the reloading manuals show lower data, I suspect this is related to the wide variety of ways to form brass for the cartridge and how that may cause an increase in pressures. H110 and WW296 are the same powder, different containers. 0. one to look at! Enter your email address to subscribe and receive notifications of new posts by email. Jump to Latest Follow 1 - 11 of 11 Posts. 7.62x51mm NATO. The ability to shoot a wide range of bullets is a mixed blessing. 300 BLK, Cartridge Selection, Reloading While the .300 Whisper and .300 Blackout cases are virtually the same, the Blackout throat is a bit longer, so it's okay to use Whisper ammo in a Blackout, but Blackout ammo might not work in a Whisper. I like my custom 300 BLK. Hodgdon data only shows IMR4227 loads. just got my 300 dies in and picked up some speer tnt 125gr hp , i found data for 130gr but not any for 125gr ,, i wanted h110 but only could find this 4227 ,, does anyone have any load data for the 300 blackout ,, On the up side, firing the 300 BLK from a precision rifle is a pleasure. Running a rifle like this suppressed would be a hoot. Although The High Road has attempted to provide accurate information on the forum, The High Road assumes no responsibility for the accuracy of the information. Discussion in 'Handloading and Reloading' started by trigga, Aug 16, 2014. 300 Sav. 30-30 Win. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. I am curious about IMR 4227 powder. Lyman 50th Edition has data for 160gr #311672 and 180gr #311332 using Rx7, H4198, IMR-3031, H335 and AA2230. Since I wasn’t trying to build a wildcat 300-221, which is what a modified 300 BLK would effectively be, I went with a standard chamber cut by a Manson Reamer. 300 Win Mag. For reloading information: WARNING: The loads shown are for informational purposes only. 110: Sierra: RN Pro-Hunter: Lil Gun: 16: 2150: 1129: 18.5: 2400: 1407 #2100: 1.845: 1x8” Rem 7 ½ 300 RCM. http://www.300blktalk.com/forum/viewtopic.php?f=141&t=81569. Sub-sonic loads for .300 blackout. I see a couple of very reduced .223 loads but not much else. These will be plinking rounds only. Anecdotal accounts from other shooters indicated this would provide the best accuracy with the 220 grain Sierra MatchKing (SMK). For lightweight supersonic loads IMR 4227, Hodgdon CFE Black, Hodgdon H110, Winchester 296 and Alliant 2400 are good options. In many ways, it is the anti-rifle cartridge. These guns have had mixed success. Available on backorder. The 300 BLK is an interesting cartridge for the rifleman. Universal Sling Adapter Review, USMC M40A5 Build- Part 1: Gathering the Parts, Modular Driven Technologies (MDT) LSS Chassis Review, MDT LSS XL shines during backcountry hunt in New Mexico, Tactical Operations bolt knob installation on a Remington 700, Building a custom Tikka T3/T3X precision rifle, Custom 338 Lapua Magnum Precision Rifle Build, Refreshing a poorly machined Remington 700 action. Post was not sent - check your email addresses! This can lead to poor accuracy from lighter loads. The gun doesn’t move, there is even less recoil than an AR because you don’t have the mass of the bolt carrier reciprocating in the rifle. 300 BLK load development: 125, 135, 175 and 220 SMK with H110 and IMR 4227. Known for its ability to deliver heavy subsonic bullets for standard AR magazines while cycling the action in … IMR 4227 for 300 Blackout. "wedge" bullet, OAL 2.15", CCI-400 primers, 91-97 degrees at about 6000' ASL. TRAIL BOSS and IMR 4227 are great powders for that. If you aren’t worried about being on the cutting edge of accuracy, the fast twist needed to stabilize the heavier bullets, means you are spinning the lighter loads way too fast. You need to use a faster powder like H-110 and AA-1680. The twist rate needed to accommodate the heavy subsonic bullets makes finding accurate super sonic loads difficult. Discussion in 'Handloading and Reloading' started by trigga, Aug 16, 2014. Best of all, Hornady has introduced .300 Whisper factory ammo and Remington has .300 Blackout loads. One of the benchrest guys I know asked how I liked my 300 BLK rifle. I told him about my load development experience and he asked why I didn’t use a 1:14″ twist and a reamer with a short throat like he planned on doing. Althought IMR and H 4227 are listed right next to each other on the Hodgdon Burn Rate Chart. IMR 4227 - 1 lb Item POWR42271. The 300 AAC Blackout (300 BLK) is a popular alternative cartridge in the AR-15/M16 M4 (AR) community. With the 208s, Both at about 1000 FPS, the 4227 was more likely to short cycle. I found some commercial manufactures (mostly off the record) either discontinued bolt guns in 300 BLK, pulled them from the market after the product was announced, or declined to introduce them due to accuracy and feeding concerns. I have been using IMR-4227, which shot fairly well, functioned well (with Silencerco Hybrid 46), but I was getting a good amount of unburned powder in the receiver/bolt. Recently there is some IMR 4227 at a store 30 mins away... the main purpose of this build is for a deer rifle. This is the best group achieved with the 300 BLK and 135 SMK at 100 yards. The low case capacity requires the use of powders with a fast burn rate like H110 and IMR 4227. Keep in mind that the benchrest crowd, the hot-rodders of this sport, feel the best accuracy is on the edge of stabilization. I understand why the 300 BLK caught on in the AR and I also understand why didn’t take off as much in the bolt guns. 300 WSM. With the right load and A LOT of tuning, the rifle shot well with both supersonic and sub sonic offerings. 30-06 Sprg. Trailboss- have not tried yet. Using bullets from Hornady V-Max, Berger TGT FB, Nosler BT, Speer HP, Sierra HPBT, Nosler HPBT, Hornady InterBond, Hornady BTHP, Speer SP, Hornady A-Max, Berger TACT. 308 Norma Mag. These are powders that are typically marketed to the magnum pistol crowd, not the rifle folks. Palmettostatearmory. more brass prep: PREP FOR PRIMERS FAST! The cartridge is a 223 case reshaped but the same length. Does anyone use it for any other rifle loads? A few manufacturers offer bolt action rifles chambered in the 300 BLK. The two key features that make the 300 BLK excellent for the AR platform, make it difficult to work with in a bolt action rifle; a short case and use of both super and subsonic  bullets. The Sierra data I have lists H4227 (NOT IMR 4227) loads. 30 Nosler. For more info, go to the AAC 300 Blk site. Neither The High Road nor any of its directors, members, managers, employees, agents, vendors, or suppliers will be liable for any direct, indirect, general, bodily injury, compensatory, special, punitive, consequential, or incidental damages including, without limitation, lost profits or revenues, costs of replacement goods, loss or damage to data arising out of the use or inability to use this forum or any services associated with this forum, or damages from the use of or reliance on the information present on this forum, even if you have been advised of the possibility of such damages. The best 5 shot group was .334 MOA while the worst was 3.787 MOA! Of course even then the 300 … Savage Axis HB Review: Sub MOA for sub $300? Hodgdon ® Powder, IMR ® Powder and Winchester ® Powder expressly disclaim any and all warranties with respect to any and all products sold or distributed by them, the safety or suitability thereof, or the results obtained including, without limitation, any implied warranty of merchantability or fitness for a particular purpose and/or any other warranty. Thread Status: Not open for further replies. 300 Rem Ultra Mag. I have shot groups just under an inch in 300 AAC and 7.62X39. It's fine to ask questions, that's how you learn. Rifleshooter.com and its authors, do not assume any responsibility, directly or indirectly for the safety of the readers attempting to follow any instructions or perform any of the tasks shown, or the use or misuse of any information contained herein, on this website. 8mm (8x57) 8mm-06. I see it gets some use in 300 Blackout, especially in subsonic loads. Savage B22 Precision Rimfire Rifle Review, Beretta M1951 mystery- cutting our way to the truth, Gunsmithing: replacing a curved steel butt plate with a rubber recoil pad, Project Guns- Gunsmithing articles and posts, check out my 300 AAC Blackout Review from September 2012, 125, 135, 175 and 220 grain Sierra MatchKings, AICS style 223 magazine from Accurate Mag, 308 Winchester Barrel Length and Velocity: Winchester 147 grain FMJ. 30 TC. They are only safe in the rifle shown and may not be safe in yours. Please take the time to read the disclaimer below and note that this data was gathered in a bolt action rifle and NOT a semiautomatic rifle. 300 Wby Mag. The 300 AAC Blackout (300 BLK) is a popular alternative cartridge in the AR-15/M16 M4 (AR) community. All Palmetto Reloading Gear/Accessories! I plan on doing more work with it and reporting back in the future. brass prep: Can Yours Do This? Rounds were fed from a AICS style 223 magazine from Accurate Mag.
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