338 Ackley ImprovedNote: where two numbers are marked, the first number is the better choice. Our understanding is that AI (Ackley Improved) means the there will be a 40 degree shoulder. Ackley – His Work and Life. Re: 338-06 Ackley Improved, any advantage? Maybe "a bit" would have been better used than "hard". Dan Ordered list Unordered list Indent Outdent 9 10. 338-06 AI provides big-game performance without having to use a magnum cartridge. 338-06 Ackley? I friend is offering me a great deal on a. 338-06 AI makes for a great big-game cartridge, as it lets the shooter use heavy bullets from 180 to 250 grains. To Ackley Improve the 338 Lapua or not?. 338 Lapua Improved is superb long range cartridge. Quality Cartridge uses the highest quality materials and equipment to produce the best brass available. The 223 Remington Ackley Improved is one of the most popular of Ackley’s creations. I do however anneal the neck every 2-3 firings. Hi to make a 338Edge out of a 300 ultra sizing die you take it to a machine shop and have them increase the neck diameter by 30 thou and that is it if you want a larger expander just replace it as you will require one for necking up the cases and for a seater just get a 338ultra die and it will work fine. My 338 ultra will run 225 gr accubonds to 3270 fps and very accurately. My 338 ultra will run 225 gr accubonds to 3270 fps and very accurately. 358 Win Ackley Improved or. Hello all, I have a longshot rifles. Rifles. Quality Cartridge started in 1990 manufacturing custom, obsolete and wildcat cartridge cases. Re: 338 Laupa/338 Laupa Improved/338 Laupa Ackley Improved The Lapua Improved and AI are two in the same. None of the Ackley improved rounds I have seen data on gave much velocity from the slight increase in case volume. 338-06 AI makes a great medium-to-large-game cartridge. However, based on long experimentation. 338 Lapua Mag Ackley Improved Match Reloading Dies. You fireform the Ackley Improved cases from standard cases - there is no factory prepped case in this configuration, nor can you form such in a resizing die. (From Handloader Issue 126) Be Alert: Publisher cannot be. Longer case life once it's said and done. Our understanding is that AI (Ackley. 338 Lapua Magnum Ackley Improved / 338 Lapua Rogue …. Plan on sticking with the 300 smk's. Hi to make a 338Edge out of a 300 ultra sizing die you take it to a machine shop and have them increase the neck diameter by 30 thou and that is it if you want a larger expander just replace it as you will require one for necking up the cases and for a seater just get a 338ultra die and it will work fine. I run either VV570 or RL-33 in my 338 LM Improved (40 degree shoulder - single shot), pushing 300 SMKs, 300 Lapua SC, or 300 Bergers to 3,000 fps w/o pressure. I will be converting my 338LM to a Ackley Improved 40 degree shoulder. I have some of the 256 gr Flatlines that I'm hoping I can get to shoot somewhere around 3300 fps. They are individually hand-stoned to cut smooth and chatter free. Making Firearm Parts and Chamber Reamers Since 1957. ALL TOOL RENTALS ARE 7 DAYS (Does Not Include Shipping Time). 338 bullet for fireforming and. 338-06 AI (left to right):. Quality Cartridge Brass 338-06 Ackley Improved Box of 200 Product #: 789154 Manufacturer #: 789154 UPC #: 197706789154 Write the First Review Q&A (1) Our Price: $659. Our understanding is that AI (Ackley Improved) means the there will be a 40 degree shoulder. 338-06 Ackley Improved grry10 Sep 18, 2013 Sep 18, 2013 #1 G grry10 Handloader Dec 7, 2007 450 305 Is a 1:9. Ackley, America's Gunsmith. Re: 338 edge ackley improved. Re: case capacity of 338 lapua ackley improved FWIW, the 338 Lapua case pushed out to 40degrees gives one of the bigger gains of all the different cases improved but after talking to Dave Kiff of PTG I'm not sure I would go the full 40degree shoulder again. 338 Lapua Improved. Chambering a rifle for an Ackley Improved Cartridge. The 3 Most Underrated Hunting Calibers. When in areas that have big, brown bears or elk, the. I think that H1000 or Retumbo are good choices but would like to hear what you gents have to say. 338 Lapua Magnum Ackley Improved / 338 Lapua Rogue Headspace ">338 Lapua Magnum Ackley Improved / 338 Lapua Rogue Headspace. 338/06 Ackley Improved Loads?. 348 Ackley improved, an improved. There was piece of barrel about 6 inches long and this just gives you an idea of the damage. Re: case capacity of 338 lapua ackley improved FWIW, the 338 Lapua case pushed out to 40degrees gives one of the bigger gains of all the different cases improved but after talking to Dave Kiff of PTG I'm not sure I would go the full 40degree shoulder again. Then pour this charge into the pan of your powder scale and weigh the charge. Ackley Improved group at 100 yards. I only shot it at the gun range, never got to hunt with it though. I like the ballistics of the 338-06 cartridge very much; but as vapodog said, it is not a round that actually benefits very much from having the shoulder blown out a la Ackley. case capacity of 338 lapua ackley improved. Ackley revisited the. IIRC, I'm getting around 2660fps with Hornady 162 AMax in the fire form loads. Some will say it will help prevent excessive case stretch prolonging case life. 338-348 Winchester Ackley Improved 40° Shoulder Custom Chamber Reamer. Once the powder is decided on, it is weighed on a Frankford Arsenal Intellidropper. 338 Lapua Ackley Improved offers several advantages over the. 5-pound rifle using the same weight bullet of 250 grains has 53. 284-inch-diameter bullets—with the final Ackley variant changing the shoulder angle from the 17½ degrees of the Springfield family to a much steeper 40 degrees, and with the shoulder moved forward by 0. I’m getting slightly heavy bolt lift and really light extraction marks with 102+g of our RL 33. This rifle is in excellent condition. 338 Lapua Ackley Improved offers several advantages over the. I built a 338 lapua improved 30 degree. Description: Custom 338-06 Ackley Improved built on Remington 700 action. With different barrels specs they often even run the same velocity or one or the other faster. If you use the 250+ grain bullets you'll be glad you have it. 280 Remington—that cartridge being the. Compare that to the ubiquitous (and more powerful) 338 Win. I run either VV570 or RL-33 in my 338 LM Improved (40 degree shoulder - single shot), pushing 300 SMKs, 300 Lapua SC, or 300 Bergers to 3,000 fps w/o pressure. Quality Cartridge Brass 338. May 16th, 2017 Big Rig —. 338 Rock barrel with a #4 contour. He used too much pistol powder and destroyed the rifle. Hi, I will be converting my 338LM to a Ackley Improved 40 degree shoulder. 303 Ackley Improved, an improved version of the. Since each gain in velocity (again, at the same. Hawk Cartridges were designed by the Author of P. The big advantage for the other two is that, You can use a standard, 8 m/m Mauser Action or a standard 30-06 action for the 338/06 or 35 Whelens and reduce the cost over converting a standard action to a Mag bolt face and sometimes opening up the rails on the action for proper feeding for a. 338-348 Winchester Ackley Improved 40° Shoulder Custom Chamber Reamer Reference: dbb98a43 Condition: New product PTG removable pilot reamers are produced from premium M-42 tool steel. 338×56 RS AI, giving it the power between the. That being said, you can start with the maximum loads for any given bullet and increase in 1/2 grain increments. Both bullets and barrel are treated with hBN. The Ins and Outs of Fireforming Cases. Ackley Improved group at 100 yards. Re: 338-06 Ackley Improved, any advantage? Azshooter # 4445119 09/24/10. Ackley typically firewalled the pressures and that gave more. 26" Pac-Nor barrel, H-S Precision stock with cheekpiece, H-S precision floor plate with detachable magazine, Shilen trigger, and Warne bases and quick detachable rings. The improved case (left) doesn't have a tapered body and has its shoulder moved forward at a sharper, 40 degree (versus 20 degree) angle. 338 bullet for fireforming and. 348 Ackley improved, an improved. 338 Federal While the 300 Blackout has enjoyed broad appeal across a wide range of hunters and shooters, the. The 338 ultra is a awesome round,so close to the edge that to me the edge has no advantage. 338 Federal with 200-grain bullets at the same pressure is approximately a 3% gain. The reamer I specd out for the 300 grain Berger’s but did stay on the conservative side in case I wanna play with the. 30 per piece) Discontinued Finish: Brass Quantity: 200 Piece Questions? Let us help! Visit Our Help Center Email To Friend Specifications Q&A (1) Reviews Product Overview. Hi, I will be converting my 338LM to a Ackley Improved 40 degree shoulder. For what it's worth, the 200, 210, and 225 grain bullets are probably you best THUMP for the that rifle. and their are also reamers available the reamer cost does come into it but if you would like sompthing diferent make what ever you like that is what we are hear for you could then share your info and. 338-06 Ackley Improved @ www. Going to start fire forming and taking some advice off this thread among other places. If you want the maximum have SSK Industries make you a 330-06 JDJ, which has a 60 degree shoulder, not the 40 degree shoulder of the Ackley Improved which give you even more powder room. 338-06 AI makes for a great big-game cartridge, as it lets the shooter use heavy bullets from 180 to 250 grains. 338 Lapua Ackley Improved / 338 Lapua Rogu Gauges Set (Go / No-Go / Field). I like RL-15 for the 200-210 weight bullets in the AI. I have a gun that is essentially a 338 ultra improved and it is worthy of some consideration. We are gathering reloading components right now and will probably finish the build in late 2022 or 2023. The extra to make an ackley improved over a 338 edge is not worth the added expense for dies at least with the edge you can modify 300 dies. 26" Pac-Nor barrel, H-S Precision stock with cheekpiece, H-S. 338 Federal is designed for one specific application: mountain hunting. 3115) Series II Taper Crimp Seater Die. But I have been trying to find data on the 358 Win do get an idea as to what the AI would add to it, or just stick with the 338F. 338-06 AI brass after fireforming. It would make a great medium to large game round using the 160gr TTSX to the 230gr bullet. com has an excellent page with information on the 223 Remington Ackley Improved here. Need info like, Primers, Charge weight, how far off the lands, etc. htm yooper77 See more Reply Save Like R roper · #4 · Jan 31, 2010 yooper77 said:. If you want to push 275-300 grainers fast, you really want the 338-378 Wby case, and a long barrel. 338-348 Winchester Ackley Improved 40° Shoulder Custom Chamber Reamer. 338 Winchester vs. 303 British Mark VII service cartridge. Product Overview. I prefer a 225 grain Partiton for elk and the 180 grain Ballistic tip for deer sizes critters. That level of consistency should keep all bullets inside a 7. Most guys with the Lap Imps are getting around 2950. Re: 338-06 Ackley Improved, any advantage? Maybe "a bit" would have been better used than "hard". But once it got to pressure the cases came out perfect. Hawk Cartridges were designed by the Author of P. PTG removable pilot reamers are produced from premium M-42 tool steel. Many years ago, in the '80's I owned a 338-06AI. A relativley fast burning powder would be the mid-burners such as RL-15, 4064 and 4895. He was trying to fire-form cases using pistol powder. Going to start fire forming and taking some advice off this thread among other places. 52 In Stock 9mm Luger Custom Grade Dimension Expander Die 005-044517 | Hornady $28. I think I read somewhere that Litz was using that prototype at the King of 2 Miles last year. 338 Federal 4 Products 338 Lapua Mag 7 Products 338 Marlin Express 3 Products 338 Norma Mag 3 Products 338 Remington Ultra Mag 5 Products 338 Ruger Compact Mag 3 Products 338 Weatherby RPM 2 Products 338 Winchester Mag 7 Products 33 Nosler 4 Products 33 Winchester 1 Products 340 Weatherby Mag 4 Products 348 Winchester 4 Products. The 338 ultra is a awesome round,so close to the edge that to me the edge has no advantage. You should see an increase of velocity of 150. We are in the process of building a 338 Lapua Mag Ackley Improved. Looking to do a 2 barrel custom build. Nov 26, 2011. 348 cartridge was very poorly designed in a way mainly because it had such a steep body taper that the bolt thrust developed was much greater than it should be, and this bolt thrust undesirable as it is, is doubly so in lever actions. I have built a few 338/280 Ackley Improved and this is niping on the heels of a 338 Win mag. Redding makes a set of dies for it. 280 Ackley Improved. You should see an increase of velocity of 150-200fps over the standard loads when you find a good safe load for your rifle. 338) Series III Seating Die 005-044390 | Hornady $28. None of the Ackley improved rounds I have seen data on gave much velocity from the slight increase in case volume. Avoid max pressures and anneal, anneal, anneal. The barrel is a Lilja, 30" 1-10 Twist, #8 Contour. 308, then partially sized to leave a false shoulder. Ruger M77 338 Win Mag Rifle - Used in Good Condition. Wanting to start reloading as my factory ammo is getting too expensive to shoot regularly. The Ultimate Reloading Manual /. Quality Cartridge uses the highest quality materials and equipment to produce the best brass available. Nothing is done to the throat, loading at 5 thou off the lands which puts me at 2. I'm thinking that 102 grains of RL26 is surely a good hunting load using the "Bad 270 Super D. I don't have any "gun notes" saved but do rememebr it was the most accurate rifle I ever shot. Made to SAAMI specifications for standardized cartridges and to the current industry standard for popular wildcat. Simply fire them in the AI reamed chamber and you will have the formed cases. Many of the Lapua Improvements and other Improvements for that matter are down around a 35 degree shoulder angle. So if I’m running a 338 LM AI with a bore rider throat, and I’m fire forming normal Lapua brass with RL33 do I start with normal Lapua loads that are down in the high 80 or low 90 grains or can I start up towards the 100 grain mark with virgin Lapua brass?. 338-06 Ackley Improved, an improved. 30-03 Springfield necked down to hold. Chambering for Ackley Cartridges – P. Many years ago, in the '80's I owned a 338-06AI. So I’m building a 338 Norma magnum and decided to go with an improved version. We are in the process of building a 338 Lapua Mag Ackley Improved. The 338-06 chambering was a popular wildcat dating back to the late 1950s. 338 Federal Ackley Improved (338. The cartridge was designed by Federal in 2006 to provide "big-bore wallop in with moderate recoil in lightweight, short, bolt-action rifles," according to W. 338 lapua with ackley improved shoulder and was wondering what load info if any you can provide to make it work smoother. SOme points mentioned already do have some truth such as the 338 edge has the option of using tougher Nosler brass and dies are somewhat easier to comeby for it also. 338 Lapua cartridge. Again this is a Lapua improved with a 40° shoulder. If the improved case will run the 330 gr over 3000 fps it will be a monster for sure. 338-348 Winchester Ackley Improved 40° Shoulder Custom Chamber Reamer Reference: dbb98a43 Condition: New product PTG removable pilot reamers are produced from premium M-42 tool steel. Starting with 35 Whelen brass would be great. 338 Federal with 200-grain bullets at the same pressure is approximately a 3% gain. Lots of pressure tested data here, not the usual fly by the seat of your pants found with many wildcats. I understand why he said that, not all cartridge show substantial gains in velocity from the process. 338 Lapua Ackley Improved Loads. Zeroing both at 200 yards, the. 338 Lapua Magnum Improved for King of 2 Miles Match Click Image above for full-screen version There’s a talented new team getting ready for the 2017 King of 2 Miles (KO2M) Competition in Raton, NM next month. 00 SKU: 338 Federal AI Categories: 338 , Ackley , ALL , Reamer Rentals , Rifle Tags: 338 Federal , 338-08 , Ackley , AI , Improved. ” The 8mm Mauser is still very popular worldwide. Priming Tool Shell Holders. Re: case capacity of 338 lapua ackley improved FWIW, the 338 Lapua case pushed out to 40degrees gives one of the bigger gains of all the different cases improved but after talking to Dave Kiff of PTG I'm not sure I would go the full 40degree shoulder again. The plain Lapua will do the job too. This is my first venture into a “wildcat” of sorts. If I remember right it took 35 grains to fully form the shoulder. I'm into 12 firings on my first 100 brass and it's still going strong. I neglected to mention that all shots are fired from the same 338 Lapua Magnum Ackley Improved (the orthodox 40* shoulder) with a 32" Bartlein gain twist. Sep 18, 2013 #2 JD338 Range Officer Staff member Nov 4, 2004 22,741 3,341 I think it should be fine. A standard 30-06 won't clean up a 308 without a serious setback and shortening of the barrel. I do however, have three Ackley improved cartridges. Description: Custom 338-06 Ackley Improved built on Remington 700 action. The team features ace F-Class shooters Ian Klemm and Dan Pohlabel. 30-06 AI and I'm guessing that the Improved case has about 7% increase over the Standard case (similar to the. Either is an precisely inexact term. 338 Lapua Ackley Improved Load Help. 338 Lapua Magnum Improved for King of 2 Miles Match. Quality Cartridge started in 1990 manufacturing custom, obsolete and wildcat cartridge cases. You should see an increase of velocity of 150-200fps over the standard loads when you find a good safe load for your rifle. 00 Quantity Choose Gauge Type GO Gauge Add to cart Add to wishlist More info Pacific Tool and Gauge offers three lengths of headspace gauges per rifle caliber. 338 Lapua Magnum Ackley Improved / 338 Lapua Rogue Headspace Gauges Reference: d0970b4c P5667610 Condition: New product Please Call to Verify Stock Send to a friend Print $69. Those powders work well in the standard version of the 338-06 but H4350 seems to be better in the AI version expecially with 225-250 grain bullets. The resulting increase in velocity has a lot to do with the beginning case capacity and the bore capacity relationship. 338 Federal Ackley Improved (338-08 AI) $ 42. I took a picture and I will get Jeff Dorr to help me post it here. Since each gain in velocity (again, at the same pressure) requires a gain of approximately 4 times as much in powder room. There is really no trick to it - Weatherby is making 338-06 cartridges which can be had. 3115) Series II Taper Crimp Seater Die 005-044509 | Hornady $29. Quality Cartridge Brass 338-06 Ackley Improved Box of 200 Product #: 789154 Manufacturer #: 789154 UPC #: 197706789154 Write the First Review Q&A (1) Our Price: $659. , which has bullet weight options ranging from 180 to 300 grains, making this cartridge more appealing to a broader demographic. Description: Custom 338-06 Ackley Improved built on Remington 700 action. I saw the aftermath of the explosion. ) Ackley was a well known author and gunsmith who. 338 Lapua Ackley Improved offers several advantages over the. 338 Lapua Improved is superb long range cartridge. 2985 instrumental Oehler 35 center screen @ 10'). Quality Cartridge Brass 338-06 Ackley Improved Box of 200 Shop All Featured Ammunition. 338 Lapua Ackley Improved. We are gathering reloading components right now and will probably finish the build in late. 30-06 Ackley Improved (5) 30-06 Springfield (49) 30-20 Thompson Center (7) 30-30 Ackley Improved (2) 30-30 Winchester (26) 30-338 Winchester Ma (8) 30-378 Weatherby Magnum (8) 8. 5" grouping rifle is nothing to be ashamed of. To read our full Repair Policy Click here. 338-348 Winchester Ackley Improved 40° Shoulder Custom Chamber Reamer Reference: dbb98a43 Condition: New product PTG removable pilot reamers are produced from. 338 Lapua/338 Lapua Improved/338 Lapua Ackley Improved. on the rifle range in Utah. 338 Lapua/338 Lapua Improved/338 Lapua Ackley …. fla3006: I had a Model 70 in 30-06 rebarreled and chambered in 338-06 Ackley Improved, with a 40-degree shoulder. Ackley said he regretted using the term “improved” in conjunction with these designs. 00 35 Whelen Ackley Improved 338 Edge (338/300 RUM) Please Note: All rental items are subject to a repair/replacement charge if returned in unsatisfactory condition. Action work and barrel installation done by Pac-Nor. Description: Custom 338-06 Ackley Improved built on Remington 700 action. I used blem 250 hornady match bullets and unique pistol powder. 338 Federal is designed for one specific application:. 338-06 AI makes a great medium-to-large-game cartridge. Re: 338 edge ackley improved. 303 Ackley Improved, an improved version of the. I left a 1-9tw Krieger Rem varmint at 26", and have been fairly pleased with it, using S168MKs & H100V to fire form WW7mm-08 brass that's had necks expanded to. Gives you a false shoulder to headspace on when fire forming. 338-06 Ackley Improved Rigby257 Apr 11, 2008 R Rigby257 New member Joined Jan 29, 2008 Messages 99 Reaction score 0 Location Anchorage Apr 11, 2008 #1 Looking for load data and a good fire forming load from any of you wise veterans of the shooting sports for a 338-06AI. 338-06 Ackley Improved, an improved. Along with the high quality of their products Quality Cartridge also properly head stamps over 450 different calibers from popular. The 338 through 411 Hawk are true wildcats with the shoulder moved forward. 338) Series III Seating Die. Ackley typically firewalled the. Right now we have several hundred pieces of brass to fire form, several hundred loaded 338LM 250 gr and several hundred 300gr Berger OTM. May 13, 2021. Parent brass is readily available and reported velocity gains average 100-140 FPS depending on bullet weight. Might have to neck turn if you start here. Shaw barrel; Redfield 2 3/4x scope in Sako mount. 5” grouping rifle is nothing to be ashamed of. 338 Federal While the 300 Blackout has enjoyed broad appeal across a wide range of hunters and shooters, the. 338 Winchester Magnum, with a 6. Ackley said he regretted using the term "improved" in conjunction with these designs. It will just vary as too which shoulder angle the gunsmith doing the barrel has a reamer for. It will be about 75-100fps slower. A standard 30-06 won't clean up a 308 without a serious setback and shortening of the barrel. Dave, as well as others believe believe anything over 37. Best Ackley Improved Cartridge? — Ron Spomer Outdoors. Re: 338 Laupa/338 Laupa Improved/338 Laupa Ackley Improved The Lapua Improved and AI are two in the same. I understand why he said that, not all cartridge show substantial gains in velocity from the process. Now take that 10 percent load for your case and put it in your normally primed case. This means Ackley Improving would have to gain about 12% in powder space. My current lot of brass has right at 12 reloads on it. Making it a. Today Ackley is know for his Improved Cartridges. [18] [19] The cartridge was standardized as the 338-06 A-Square with SAAMI in 1998 by the A-Square Company. The data and opinions contained in these posts are the results of experiences with my equipment. The part I could use a little help with is the fire forming process. An MOA rifle would keep all shots inside a 5" circle at 500. 338 Winchester Magnum, with a 6. Chambering for Ackley Cartridges. Rechambering a custom rifle for the 223 Ackley Improved. Giving up a little velocity for less recoil, the. 338-06 AI provides big-game performance without having to use a magnum cartridge. Right now we have several hundred pieces of brass to fire form, several hundred loaded 338LM 250 gr and several hundred 300gr Berger OTM Hybrid bullets. Divide that amount by 10, so that 1/10 of the total volume will become your starting load. 348 Winchester which gets about 200 feet a second more velocity over the standard. Quality Cartridge Brass 338-06 Ackley Improved Box of 200 Shop All Featured Ammunition. I have a gun that is essentially a 338 ultra improved and it is worthy of some consideration. It should work on antelope/deer to elk and eastern black bear that weigh 500-800lbs. That level of consistency should. I use my my 338 Lapua Ackley on our bi-monthly 1K Long range shoot. 338 Lapua Magnum Ackley Improved / 338 Lapua Rogue Headspace Gauges. Like I said the newest brass still has tight primer pockets after 5 or 6 firings right about 3000fps (c. Most guys are getting about EDGE velocities with the 338 Lapua--right around 2800fps-2850fps with the 300 grainers out there and a 30" barrel, give or take. If the improved case will run the 330 gr over 3000 fps it will be a monster for sure. Re: 338 Laupa/338 Laupa Improved/338 Laupa Ackley Improved. Since it's an improved case, I think it would be wise to neck up 30-06 cases (Assuming 338-06 hulls are not available) to 35 cal, and then neck down. Want a good 300 yard brush gun with good FPS, and the other will likely be a 6. I neglected to mention that all shots are fired from the same 338 Lapua Magnum Ackley Improved (the orthodox 40* shoulder) with a 32" Bartlein gain twist (1:9. It will just vary as too which shoulder angle the. The 240 through 3200 Hawk are all variations on the 280 Ackley Improved concept. 348 Improved was developed upon request of many shooters owning Model 71 Winchester rifles. 338 Federal Ackley Improved (338-08 AI) You may also like… 338 Federal T Handle Reamer Extension (3/8″ square shank) $ 10. With almost no taper and a 40 degrees shoulder, case stretching is almost non-existent. 338 Lapua Mag Ackley Improved Match Reloading Dies">338 Lapua Mag Ackley Improved Match Reloading Dies. 338-06 Improved Warning! Notes: Test rifle was a Sako L-61R with a 24-inch E. 92 In Stock 1 2 3 4 5 Next » Sort By: Items Per Page: Item Total: (2849) 0 - 30. I've used some of their data to help me find starting points for my rifles. Fill the case with Bullseye® pistol powder to the top of the neck (DANGER, never to be fired). Fire-formed 223 Ackley Improved case (left) and fired 223 Remington case (right). Most well know of all is probably the 280 Ackley Improved, because Nosler decided to take it to SAAMI and make it a "factory" cartridge. I will be converting my 338LM to a Ackley Improved 40 degree shoulder. 338-06 AI brass after fireforming. 338 Lapua Ackley Improved / 338 Lapua Rogu Gauges Set (Go / No-Go / Field). 338-06 A-Square (which is a. The 240 through 3200 Hawk are all variations on the 280 Ackley Improved concept. Here is a link to Reloaders nest. Also, it was reamed with a Pacific Reamer.