The .280 really comes into its own with the slower powders in a bolt action. But, shot .280 Rem A I loads up to 64gr of H4831, 139gr Hornady BTSP, R-P brass, WW primers today. Ackley after he added a 40-degree shoulder to Fred Huntington’s .280 RCBS Improved. A 280 AI can safely fire 280 Remington ammunition, simultaneously fire-forming brass cases to reloadable 280 AI dimensions. I contacted Hornady and they didnt have any load data for Rl 23. I started with the 140 Accubond but has since moved onto Nosler 150 gr. 280 Remington chambers can be easily converted to 280 AI. Well, I was hesitant to go this far. Then, in 2019, Hornady introduced a 162-grain ELD-X bullet loaded in the .280 AI, adding it to the excellent Precision Hunter line of ammunition. Primary use will be elk hunting followed by long range plinking. However I plan on taking it to Africa for a plains game hunt and the guide won't allow those bullets. IMR 4831, H4831SC and RL22 have all worked very well for me. It use to be that .500 was the popular group size now it seems that the popular group size is .250 Read a good article about group sizes, it said that the true test of a rifle is to shoot 10 shot groups and that a … Using bullets from Nosler BT, Sierra HPBT, Swift Scirocco, Barnes TSX, Swift Scir, Nosler AB, Hornady BTSP, Swift SP. One of the greatest wildcat cartridges ever made, the .280 Ackley Improved was developed by the legendary P.O. While 100-, 110-, 115- and even 120-grain bullets can be pushed to obscene speeds for varmints, the .280 is really a big-game round and is at its best with 140- to 175-grain bullets. Unfortunately 162 Hornady ELD-X factory loads were disappointing. Barrel is 26" … ELDx in their 280 AI? 280 Ackley Improved Suggested Bullet Use Suggested Bullet Use 168-grain LRX BT Sectional Density .298 Ballistic Coefficient .550 C.O.A.L 3.300” 171-grain Match Burner Sectional Density .303 Ballistic Coefficient .645 C.O.A.L 3.330” Maximum Loads Should Be Used With Caution - Always Start With Minimum Loads. … Just got my 280 AI put together after "thinking about it" for 10 years. I want to shoot 168 Berger VLD hunting bullets. Factory data has it exiting the muzzle at 2,850 fps, just 90 fps slower than the same bullet in Hornady’s 7mm Remington Magnum ammo. Average velocity was 3160fps and first 3 shots went into .75" with the 5 shot group going 1.2". 280 AI was standardized by Nosler in 2008 and, SAAMI approved, is now being sold as factory loaded ammunition. Extra time and care is taken in the creation of our cases, producing smaller lots that meet strict quality standards. Ballistic Tip and finally the best of them all has been the Hornady 162 AMax and yes the AMax … bullet. The exception is with the monolithic Barnes TS-X, Hornady … Hornady 280 Ackley Improved Rifle Reloading Brass - At Hornady brass is the foundation for what could be the most memorable shot of your lifetime. Looking forward to dialing it in. .280 Ackley Improved, Bullet 162gr Hornady ELD-X, Brass Hornady | Nosler, Muzzle Velocity* 2970fps, Ballistic Coefficient G1/G7 .670/.338, COAL 3.330″. Absolutely no signs of excessive pressure. *Most Accurate Load … I has also been my experience that factory 280 shoots extremely well in my AI'd version. .280 Remington Ackley Improved / .280 Ackley Improved (Hodgdon Data - IMR Powder) reloading data with 126 loads. He typically won't allow anything less than 30 cal on the bigger antelope, Eland, Kudu … Since its inception in the late 1950s, the cartridge has continued to pick up steam among big-game hunters, … Anyone try Hornadys 162 gr. 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