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280 rem in 280AI

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Unread 04-03-2013, 10:08 PM
Silver Member
Join Date: Jul 2012
Location: Portland, Oregon
Posts: 447
280 rem in 280AI

I know you can shoot standard 280 rem's out of a 280AI, but curious about the downsides, if any. I am debating a 280 vs AI and want to understand what compromises I will have (if any) shooting a 280 rem out of an AI from time to time.

Is accuracy affected? I have read in some places that it is, but I trust the folks here more than any other site, and know that many folks have 280AI's here.

I have heard that velocity is impacted, but I want to make sure that the frame of reference is fully understood. Is it the obvious lower velocity of rem vs AI? Or is the comparison of a rem out of AI vs a rem out of a rem? I.e. will a 280 rem out of a 280AI have a lower velocity than a 280 rem load fired out of a 280 rem chamber, all else being equal?

Thx in advance.
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Unread 04-03-2013, 10:47 PM
Junior Member
Join Date: Oct 2011
Posts: 21
Re: 280 rem in 280AI

iam not 100 % sure on this but it would be my understanding you get lower velocity because the case size on the AI is bigger than a 280 rem
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Unread 04-03-2013, 10:56 PM
Platinum Member
Join Date: Jan 2008
Posts: 1,132
Re: 280 rem in 280AI

Velocity will be slower because you'll be burning less powder.
You may or may not have accuracy loss. It depends on the harmonics of your barrel. I have seen standard rounds shoot very well out of AI barrels, and some not so much. What you will have is a POI change, sometimes dramatic.

I think that the .280 AI is a great chambering. Nosler has factory loadings for it (i think) and if not you can run the standard .280 stuff through it in a pinch. It is definatley in the running for the most efficient way to get a 180 grain .284 bullet around that 3000 fps mark and it feeds like butter.
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Unread 04-03-2013, 11:12 PM
Silver Member
Join Date: May 2010
Location: Lewiston, Id
Posts: 158
Re: 280 rem in 280AI

You would basically be fire forming the .280's into a AI. But with my experience and understandings of fire forming is not to use full weight charges. The .280 AI is a bad ass round.

you better do some more research about shooting the standard rounds in the AI chamber
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Unread 04-04-2013, 01:59 AM
Junior Member
Join Date: Dec 2012
Posts: 23
Re: 280 rem in 280AI

Guys shoot factory ammo to fire form brass for AI's. I would bet that handloads where the bullet is seated so its into the lands will be accurate, but slower, as some of the energy is going into forming the brass, and not pushing the bullet out the barrel. Looking at getting a 280 and then reaming it to a AI. From what I've read the Nosler is differant than the original AI. Still trying to decide which to do.
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Unread 04-04-2013, 03:33 AM
Silver Member
Join Date: Jun 2011
Location: Florida
Posts: 350
Re: 280 rem in 280AI

The 280AI is probably my favorite rifle in my herd. Mine shoots the exact same between REM and Ackley except for velocity, it shoots in the low .3s with both loads. Im shooting full charge REM loads to fireform and have not had any problems. Im pushing 140 gr VLDs around 3150 with RL22 for my best acurracy, although Im about to start trying some 168s.
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Unread 04-04-2013, 07:46 AM
Platinum Member
Join Date: Oct 2008
Location: Alabama
Posts: 10,003
Re: 280 rem in 280AI

My next build is going to be a custom .280 AI off a trued & blueprinted 700 action.
"I'm just a peckerwood who lives in the hills with too many guns..." - Bob Lee Swagger

"Give me a minute...I'm good. Give me an hour...I'm great. Give me 6 months...And I'm unbeatable." - Col. Hannibal Smith

Originally Posted by WildRose View Post
The 284 is to the STW what a tricycle is to a Ninja.
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