280 remington into ackley improved

[ddraper110]

I am getting a new custom sako 280 ackley improved soon. Trying to get brass and dies. I see people talking about fire forming 280 remington brass. Some are even saying use cream of wheat. Can someone explain fire forming technique??

[stubblejumper]

Why not just buy some Nosler 280AI brass?

[Pawildman]

ORIGINAL: stubblejumper

Why not just buy some Nosler 280AI brass?

Probably the best way to go. If you don't already own a .280 Rem and have a pile of brass on hand, why would you want to go through the fireforming process with it? If you need to buy brass anyhow, just buy the Nosler 280 AI brass and get to load development right off the bat.
As for fireforming, whether you use the Cream of Wheat method or simply load .280 Rem. brass with a mid to stiff powder charge of rifle powder and a .284 bullet, you're going to form that case to the new AI chamber dimensions which include a 40 deg. shoulder and minimum body taper. Buying the Nosler brass eliminates that step.

[stubblejumper]

I just purchased a Cooper 280AI myself,and even though I have done some case forming in the past,it never crossed my mind to fireform 280 rem brass.I simply bought some 280AI brass,and I can immediately begin load development with no time and components wasted fireforming brass.

[hunter5325]

If you do end up forming your own I've had best luck with a faster burn rate powder and a mid range 280(not AI) load.

I also had a pard that tried to form nickel in his AI with poor results...

[salukipv1]

I believe Jarret loads ammo for this round too. Read up about his thoughts on it...

http://www.jarrettrifles.com/calibers.html

[stalkingbear]

All you have to do when fireforming .280AI from .280 brass is simply shoot standard .280 loads in it. That way not only is it formed, but it's also fireformed precisely to YOUR chamber at the same time. I wouldn't buy the Nosler .280AI brass because of the higher price-even if it is better.

ORIGINAL: ddraper110

I am getting a new custom sako 280 ackley improved soon. Trying to get brass and dies. I see people talking about fire forming 280 remington brass. Some are even saying use cream of wheat. Can someone explain fire forming technique??

[Ridge Runner]

nosler brass is junk! won't take near the pressure rem. will and rem is the bottom of the barrel.
AI cartridges are headspaced .004" shorter than its parent, you can just fire 280's in it or use cream of wheat (though I prefer cornmeal)
COW fireforming!

neck cases to a crush fit, in your case just use 280 rem cases, prime, use a charge of 11 gr of unique, tap case on a tableto settle powder in bottom of case, fill with COW, tap case on table again to settle COW, take a paper towel, tear a 1.5" strip off of it ant twist into a tight worm, pack it into the neck till it makes a plug and pinch it off (around 1.5") pack in the neck with a small puch.
If you have a brake, take it off, keep muzzle pointed downhill so COW doesn't fall back into the chamber and dimple your next case, watch barrel heat (it gets hot!)
if done properly the case is fully formed with the exception of slightly rounded shoulders
I don't have a 280 but I form 6.5 Gibbs from 270 win, here is a pic of a COW FF'd 6.5 gibbs beside a 270 cartridge

RR

[trailer]

ORIGINAL: Ridge Runner

nosler brass is junk! won't take near the pressure rem. will and rem is the bottom of the barrel.

Is this from personal experience or from info BC posted a while back ? ...

[Ridge Runner]

personal experience trailor, I used the same fireform load that rem and win. took in stride and was blowing primer pockets in nosler brass, got a facefull of gas and shrapnel, and broke 2 extractors, then trashed the nosler, 40 of them were new cases.
I don't like paying lapua prices and getting junk. neck thickness varied .008", and couldn't withstand nearly the pressures that even remington could.
RR