Fire Forming 280 REm brass to 280AI...

[lhead71]

I know that traditional fire forming uses a "light" charge with the bullet seated into the lands.

Cant I just use factory loaded Rem 280 in a 280 AI chamber and it will do the same thing with the benefit of seeing how the factory stuff works in the rifle?

Please give me your opinions.

 

[Curator]

One of the advantages of the Ackley Improved chamber is being able to fire factory ammo without fireforming first. You cna go ahead and do this without a problem.

 

[Randy1911]

I was at the range one day and there was a guy sitting at the bench with his rifle clamped in a rifle vise. He would drop in a shell and without aiming close the bolt and fire. I asked him what he was doing and he said
"fire forming brass". He was shooting 257 Roberts factory ammo in a 257 Roberts AI. He said it was the best way to fire form because the higher pressure formed them better.

 

[fguffey]

The neck on the 280 Ackley is longer than the neck on the 280 Remington, when the 280 Remington is chambered in the Ackley chamber the neck is sized and the case head spaced when the bolt is closed, Not easy to keep up with but in theory there is one place on the shoulder that does not move (something like a pivot) the shoulder juncture at the case body moves forward, the neck juncture at the shoulder and neck moves back meaning the shoulder and case blows out when fired, the neck is formed when t chambers.



Then the question is asked, how did it become an improved chamber, if the barrel was not moved back or if the reamer was not advanced the reamer will not clean up the old chamber, the part that will be left is the part between the shoulder and neck.



F. Guffey

 

[john wall]

A true Ackley Improved chamber will NOT accept a GO gauge. This is why factory ammo can be fired in it. The shoulder at the case neck will abut the chamber and prevent case stretch/case head separation.

Rent or buy a 280 Remington GO gauge. If a true Ackley chamber, the bolt will not close on the gauge.

A very nice round that will, in equivalent barrel lengths, basically duplicate 7mm Rem Mag ballistics. Ballistics attainable with a 26" barrel will shock you in this caliber.

 

[lhead71]

Thank you for your reply's. I am having a 280AI barrel built for me for my T/C pro hunter.
The only question is, should I keep the 28 inch length barrel or have it made to 26 inches. The primary reason I ask is for optimum carry. This is primarily being used a s a deer/elk rifle.

 

[NCsmitty]

A T/C pro hunter can get away with the longer barrel without feeling unwieldy. I would try using the long barrel and see how it handles, as it can always be shortened later if you want.
The 280 AI is a great cartridge and provides near-magnum performance in a standard bolt face round.



NCsmitty