Home Forums Hunting & Shooting Hunting Rifles .270 Win. Ackley Improved (AI)

Anyone think about, try or have information on the .270 Win. Ackley Improved (AI)?

What velocity gain would I get from my current 22" barreled Win. Model 70, especially shooting 130gr. NPs or TSXs?

Saeed on www.accuratereloading.com mentions that it is a great killer of all sorts of plains game.

How about velocities?

I believe the 270 benefits less from the AI treatment than most cartridges. I've only worked with one and I wasn't much impressed.

The 280 is a 270AI and the 280AI is a 270's nightmare.............

The only reason a 280 A I is so good is because the factories underload tthe 280 so much. If it were loaded to the same pressures as a 270 you wouldn't see so much difference in the 280 and 280 A I. I think muledeer has explained this on here before, a lot better than I can.

Bullets matter more than headstamps. At equal pressures,the 270 cain't hang.

The 280AI simply sweetens the pot...............

Check with colmacivor. He's the only one I know of that runs a .270AI, and IIRC, has several.

I have a .270Win. My first centerfire. I have another .270 that Roy really improved. I have always read the .270Win did not benefit that much with the Ackley improvement. It seems that the .250Sav benefited about the most. I once knew a gunsmith that shot 900yd matches with a .30-06AI. Good luck.

I LOVE the 25-06AI..but my .277" disdain is hardly secreted............

Been trying to tell BobinNH that but he won't listen.................................

Can't see making a 270AI myself, now that the 280AI is factory available.

In his book "Handbook for Shooters and Reloaders", Ackley says this about the .270 AI.

In my experience the standard .270 Winchester is a great killer on a wide variety of plains game.

Apparently this is also the experience of a lot of hunters in Africa, especially South Africa, because it is quite popular there.

I have considerable experience with the .270 myself, as well as the .280 Remington and .280 AI. They are all pretty much peas in a pod. You can make arguments for the .280's with paper ballistics, but game all dies about the same when you hit them right with any of the three.

John... You're WRONG... 100 FPS and a .02 better BC is HUGE. Thats the difference between tracking a Big ass Muley 20 feet,,,,,,,,,,,,,,,,,,,,,






or 21!!








Jeesh...




Maybe its time to make your B29 fact instead of fiction High enough BC, fat enough pill...

I'm slow to weigh the impetus of Joe Average's "experience",especially when it comes to bullet or cartridge selections.

Nawwwwwwwwwww...I weigh it far less than that.

Everyone's idea of "far","big" and "good" is different and I'm at ease in extrapolationg ala high standards................

Well, .270 is my favorite cartridge and I see no reason to go to A I. I have nothing against a .280, I think they are two peas in a pod. But there is a reason the .280 benifits form being A I'ed as I stated before. P.O. Ackley stated that of all the cartridges he improved the .250 was best and .257 was second. The two most efficient cartridges he worked with.

Always good to hear your well-balanced opinion, Stick.

I'm more than fair,but alas...not all things is equal.

For much of that which is typically bantied,folks fixate far too much on the superficial,as opposed to simply actually using the goods in question and amassing good practice with same,then applying those skills.

There is however time,places,applications,scenarios,where it is easily discerned even with a cursory gawk,that something is second fiddle compared to something else. There's no shame associated in that or in knowing same.

I could not openmindedly rate the 270 as a 280's equal,due simply to boolit selections available within the two seperate diameters and their inherent attributes associated.

Steering someone otherwise,when talking absolutes,would be a touch dishonest and prolly mean to boot................

RD: Oh, I listen all right,but I'm just not bighting Here's why:It isn't that I don't think a 280AI is a good cartridge,cause it is...it shares all the attributes of its' siblings,the 270 and 280.In standard cases and rifles chambered for 270/280,I want a 22" barrel.If I'm gonna use a larger case than the 06,I want 24" and I want the case to hold a 7mm bullet.The 270 and 280 do just fine in a 22" tube and if I'm gonna use a 30/06 -length action,and a 24" barrel,I'll take the 7 Rem Mag instead,which:

Has more capacity than the 280AI;and

Easily goes faster than a 280AI with any bullet weight,all things being equal;and

Doesn't kick hardly more;and

Can be bought anywhere I travel to hunt!

The 280AI ain't spot news;O'Connor and Huntington wrote about it;Huntington had it and gave it up...A buddy from Boise(who likely has as much 280 experience as anyone on here)had a 280AI back in the 80's,and more than one....I tracked his progress,and agreed with him.Velocity gains not worth it over a standard 280,and the 7RM beat it handily.The 280AI is an idea I had and rejected a longtime ago....cause the 7RM was always right there

Close perusal of load data demonstrates that whatever I can stick in the AI, I can load in a 7RM and do better......AI's are interesting,but I'll watch them from a distance

As to the 270....well,lets just say that several million dead big game animals( on several continents by now)sorta speak for themselves...don't we think? And if I'm gonna get a bigger case,then I want a 7mm bullet,and more capacity...the poor 280AI is just too "in between".....

The 280AI will remain,I'm afraid,the exclusive province of some very astute,knowledgeable rifle guys with very active imaginations......I'm not that bright...I'll just get a bigger case and get more velocity.....Besides, if I want a 150 gr bullet at 3050,I'll run down to WalMart and grab a box of 7RM 150 CoreLokts

A 22" 280AI with 162's,will smoke a 24" 7Remmie with 150's in veddy,veddy ugly fashion.

4 pokes in the belly sweetens the pot........................