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Fire-forming 280 Ackley Improved from Lapua 30-06?

 
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  #1  
Old 10-23-2010, 12:45 AM
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Fire-forming 280 Ackley Improved from Lapua 30-06?

Ok, this is my very first time doing any of this so I have some questions for those of you who are experienced at this. Since Nosler is out of 280 AI brass, I decided to buy some Lapua 30-06 brass and plan on fire-forming it to 280 AI. Do I go about it in the following order:

1. Turn the necks
2. Resize the cases
3. Debur the flashhole
4. Fire form using the malt o meal method.
5. Trim the cases to all the same length.
6. Debur the neck.
7. Throw cases in the tumbler.

Or should I resize the case before I turn the necks. I know I'll have to do this before I fire-form because my gun will have a tight neck. Any and all advice would be welcome.

Jeff
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  #2  
Old 10-23-2010, 10:36 AM
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Re: Fire-forming 280 Ackley Improved from Lapua 30-06?

Quote:
Originally Posted by jeffwhip View Post
Ok, this is my very first time doing any of this so I have some questions for those of you who are experienced at this. Since Nosler is out of 280 AI brass, I decided to buy some Lapua 30-06 brass and plan on fire-forming it to 280 AI. Do I go about it in the following order:

1. Turn the necks
2. Resize the cases
3. Debur the flashhole
4. Fire form using the malt o meal method.
5. Trim the cases to all the same length.
6. Debur the neck.
7. Throw cases in the tumbler.

Or should I resize the case before I turn the necks. I know I'll have to do this before I fire-form because my gun will have a tight neck. Any and all advice would be welcome.

Jeff
sounds like a lot of extra work to me! You are aware that you can take generic factory .280 remington rounds and simply fire them in a .280 Ackley chamber? That's the easiest way, and also the way P.O. Ackley recommended. But being as your going the 30-06 case route here's my method (yes I know many here will dissagree with my methodology).

** First thing you run into is that the .280 case is actually going to be longer than the 30-06 case length, and this may never quite come out right unless you can accept a shorter neck length (I would not). I would buy .270 cases, and simply neck them up to 7mm, or better yet buy generic .280 Remington brass and go from there. But you might beg a dozen cases from somebody that's got a bunch of extras (30-06). Resize the necks down to 7mm, and seat the bullets for about .010" jam into the rifeling. Fire form the cases with a good stiff load. After you fire the first five or six cases check them to see if the have done the banana shape in the body (I expect they will). I simply don't think you'll get a good .280 case after fire forming with this method, and even then the overall length is going to be a little short. Now should the body of the fire formed cases come out nice and strait; then you at least have a case you can use as a master for your chamber (gauge line deminsions). If you chose .270 Winchester cases, all you need to do is to neck them up to .284 and fire form the brass. The basis deminsions otherwise are very similar. The trick with fire frorming the brass is to have it very secure in the chamber. You won't have that with the 30 caliber case, but will if you use the .270 or .280 case!

Not being familure with the Lapua case catalog I can't say wether or not they sell a .270 or .280 case, but Winchester and Remington do.
gary
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Old 10-23-2010, 01:09 PM
gbp gbp is offline
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Re: Fire-forming 280 Ackley Improved from Lapua 30-06?

if you do fireform lapua 30-06 into 280 AI or just plain 280 you must jam the bullet into the lands in order to hold the cartridge into the chamber. bad juju will befall you if you don't



could have been worse
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Old 10-23-2010, 05:22 PM
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Re: Fire-forming 280 Ackley Improved from Lapua 30-06?

Quote:
Originally Posted by gbp View Post
if you do fireform lapua 30-06 into 280 AI or just plain 280 you must jam the bullet into the lands in order to hold the cartridge into the chamber. bad juju will befall you if you don't



could have been worse
I just would not go that route, and it's a lot easier to use remington factory loads to fire form the cases without all the added work. There is another way to do it using the 30 caliber cases, but you best know exactly where your going from the start or it maybe a trip to the trauma ward. 270 cases are cheap, and .280 cases can be had in bulk. Creating a false shoulder is not for 98% of the people reloading
gary
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Old 10-23-2010, 06:41 PM
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Re: Fire-forming 280 Ackley Improved from Lapua 30-06?

Use .280 brass. A quick look at Sierras' loading manuel will show why. The body length is around .140 longer on the .280AI than on a .30/06. That brass length and 'blowing out' to AI comes from somewhere.
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Last edited by shortgrass; 10-25-2010 at 07:07 AM.
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  #6  
Old 10-24-2010, 12:21 AM
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Re: Fire-forming 280 Ackley Improved from Lapua 30-06?

Thanks for the feedback. Since Nosler is out of 280 AI brass, I figured if I had to go through all the effort of turning necks & fire forming, I may as well get the best brass on the market. Explain to me why I don't want a false neck?
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Old 10-24-2010, 07:03 AM
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Re: Fire-forming 280 Ackley Improved from Lapua 30-06?

If you have to create a 'false shoulder', on the neck ,to support the case during fire forming the chamber is either too long (headspace) or the brass is too short. In either case you're asking the brass to stretch too far. I've used P.O. Ackleys' method for more than 25 yrs. That Ackley chamber is shorter than a minimum chamber of its parent cartridge (by just a few .001"). The case to be fire formed should be supported securely between the bolt face and at the junction of the neck & shoulder angle. When the bolt is closed on the round to be FF a slight resistance should be felt thru the bolt handle. That tells me the case is supported properly on both ends and that I'm not asking the brass to stetch so far that it will end up too thin or just plain part trying to fill that chamber. By setting the chamber up in this manner I've never had to 'jam a bullet into the rifling' when fire forming and factory loaded ammo has always formed just fine. Case loss from FF is very, very low,,, near zero! Use .280 brass and have zero problems (if the chamber/headspace is correct) or use .270 or .30/06 brass and have the possiblity of many problems. Powder Valley has Nosler .280 brass in stock. I'm curious, why the tight neck chamber?
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Last edited by shortgrass; 10-24-2010 at 12:02 PM.
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