Shooting 280 Rem Ammo in a 280AI Rifle

59FLH

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Jan 3, 2019
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Mid Atlantic
For those of you who have and those of you who do, what has been your experience for accuracy?

I am in the process of re-barreling a few actions and one of them could end up 280AI. If the accuracy is acceptable I will shoot straight 280 rounds until I have a qty of fire formed Ackley brass. If I can fire form my way to Ackley with 280 Rem ammo I most likely will do it, if not I will have to think about the cost and effort, and may just re-barrel in 280 Remington.

I can take a junk .284 barrel and ream it into 280AI so's not to wear and tear the new barrel fireforming, but I don't want to waste bullets, powder and primers, or I can COW with some toilet paper and Hi-Score, AA#2 etc....but I'm really not that bored. If the ammo shoots accurate its a no brainer.

Please reply with your experience shooting 280 Remington ammo out of a rifle chambered 280AI, just because I can doesn't mean I should.
 

shortgrass

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Mar 31, 2010
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Western Oklahoma
I have been chambering and shooting Ackley Improved cartridges for 30yrs. Fire forming with the 'parent' cartridge is a no brainer. 99% of the time accuracy is on par. Go for it! Just make sure the Ackley chamber is head spaced properly where the 'parent' cartridge is a crush fit.
 

JMW67

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Dec 6, 2012
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TEXAS
I have multiple ackley chamberings and with a little load development 1/2 moa is about normal out of any one of them in fact a lot of my hunting is done with fireforming ammo
 

lancetkenyon

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Jun 3, 2013
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3,513
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Arizona
I have multiple ackley chamberings and with a little load development 1/2 moa is about normal out of any one of them in fact a lot of my hunting is done with fireforming ammo
This.
I work up a fire forming load just like a final load. Find the best accuracy, and load up the rest of my virgin brass. I have shot tons of coyotes and LR steel with fire forming loads.
 

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