280AI Neck and dies

[Ackley Improved]

Guys

Need to order dies which includes a bushing die... so need some brass dimensions to work out what bushing I need.

Also, who is a goodv vendor from here to purchase dies?

so what are loaded rounds measuring at the neck on remington, Winchester, and ultimately RWS and the 280AI nosler!!

Cheers

 

[Country]

Re: 280AI Neck and dies

One way to get an idea of the right bushing diameter is to Measure the bullet diameter . Measure your brass neck wall thickness on several cases .
Then add twice the neck wall thickness to the bullet diameter and then subtract the amount you want to size down too for neck tension.
.001 for Hand fed ammo .002 for general shooting and .003 for big heavy bullets as an example.
.284 + .017 +.017 = .318 ( Average neck diameter of 280 AI will vary with different make brass)
.318 - .001 = .317 bushing. etc etc.
I presume you are talking about 280 Rem 40 degree.
My advice is to buy all three bushing sizes so you have a selection to choose from when encountering different brass thickness.
I would recommend Sinclair International ( Brownells now) for your dies they have never let me down and always been honest and efficient. Buy Redding competition die set Redding number 58428 .
Sinclair link http://www.sinclairintl.com/.aspx/cid=0/mfg=61T/k=280+AI/ksubmit=y/Products/All/search=280_AI
Plus your bushings .

 

[Ackley Improved]

Re: 280AI Neck and dies

Mate.. know all that above........

Not new to this at all.. Just need some ideas on unturned neck sizes on various brass. Be nice to buy 3 sizes like you say... but cant buy until I know what sizes.

It will be around the 0.308" for a bushing. That should work with RWS brass, Remington from what I gather is a tad bigger.

The big one is the Nosler, want to be lazy and load 280AI straight out of the box.

Dies, have ordered most likely close to $3000 maybe more from Sinclairs, but would rather support a vendor here.

Also, found measuring like you say bullet diameter, then neck walls, then adding together doesnt give the same size as a laoded round. Not sure why, but with 5 odd BR rifles all has been the same. Found this out from neck turning and measuring... This is using a proper ball mic for case walls, and a quality mic for OAL laoded neck size.

CHeers

 

[bohem]

Re: 280AI Neck and dies

My 280's ran the neck in Winchester fireformed brass to be 0.314" on average, the Rem 280 brass was 0.315"

My chamber was cut with a 0.318 neck and I didn't turn anything to make them work well.

What is your chamber being cut to? That's what you need to worry about first, without that you can dream/measure/estimate all you want but if you cut a tight neck chamber it won't matter if your brass is sized with a 0.315 or a 0.316 die, you're going to get screwed up by that 0.314 neck in the steel.

I buy from Grafs mostly because their prices tend to be the lowest and I just plain like doing business with them.

 

[Ackley Improved]

Re: 280AI Neck and dies

Wow, the rem and Winchester brass is a little thicker than I imagined. I do not know what the neck size will be on the rifle, all I know is the reamer is no turn. The guy who has built it used the same reamer on his f Class 280AI, and he is forming from 30-06Lapua, and then light turn... doesnt really help me though!!

I might have to make a call tomorrow and find out! The barrel is currently 32" long, having it cut back to 26".

Thanks for the info!!

Cheers

 

[bohem]

Re: 280AI Neck and dies

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Ackley Improved</div><div class="ubbcode-body">Wow, the rem and Winchester brass is a little thicker than I imagined. I do not know what the neck size will be on the rifle, all I know is the reamer is no turn. The guy who has built it used the same reamer on his f Class 280AI, and he is forming from 30-06Lapua, and then light turn... doesnt really help me though!!

I might have to make a call tomorrow and find out! <span style="font-weight: bold">The barrel is currently 32" long, having it cut back to 26".</span>

Thanks for the info!!

Cheers </div></div>

Why on the <span style="font-weight: bold">bold</span>?

It depends what you'd like to do with the rifle so before I get on the soapbox about chopping off perfectly usable barrel length in a borderline magnum chambering I'm curious to why you'd like to do that.

 

[Ackley Improved]

Re: 280AI Neck and dies

Mate

I would love to keep it long, but just a little impractable for what its intended use is. If it were only to see range time or competitions I'd have no problem leaving it long, but out in the field... to much trouble.

Last rifle had 30" barrel, was a bit of trouble!!

Cheers

 

[TN-MadDog]

Re: 280AI Neck and dies

I have some 280AI Nosler ammo and once fired brass at home. Will measure them but might be tomorrow before I can get it done and posted here.

 

[Ackley Improved]

Re: 280AI Neck and dies

Thanks Mate

 

[Country]

Re: 280AI Neck and dies

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Ackley Improved</div><div class="ubbcode-body">Mate.. know all that above........

Not new to this at all.. Just need some ideas on unturned neck sizes on various brass. Be nice to buy 3 sizes like you say... but cant buy until I know what sizes.

It will be around the 0.308" for a bushing. That should work with RWS brass, Remington from what I gather is a tad bigger.

The big one is the Nosler, want to be lazy and load 280AI straight out of the box.

Dies, have ordered most likely close to $3000 maybe more from Sinclairs, but would rather support a vendor here.

Also, found measuring like you say bullet diameter, then neck walls, then adding together doesnt give the same size as a laoded round. Not sure why, but with 5 odd BR rifles all has been the same. Found this out from neck turning and measuring... This is using a proper ball mic for case walls, and a quality mic for OAL laoded neck size.

CHeers </div></div> Obviously you don't . Even batches of the same brand can vary . Sinclairs will give you better service and better prices than any Australian dealer.

 

[Ackley Improved]

Re: 280AI Neck and dies

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Country</div><div class="ubbcode-body"> Obviously you don't . Even batches of the same brand can vary . Sinclairs will give you better service and better prices than any Australian dealer. </div></div>

Obviously I do know.... Only been shooting competitive benchrest for around 7 years, both short range and long range, loaded up many different brands of brass in many calibers... neck turned, non neck turned. Have seen the different sized brass, but it is not that excessive that I will need 3 different bushings etc.

Looks like RWS is around 0.310" as a loaded round, and the Nosler the same, or very close too.

A 0.308" bushing will do me, neck on the rifle will be around the 0.313-0.315". Still waiting on answer there though!

CHeers

 

[TN-MadDog]

Re: 280AI Neck and dies

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: TN-MadDog</div><div class="ubbcode-body">I have some 280AI Nosler ammo and once fired brass at home. Will measure them but might be tomorrow before I can get it done and posted here. </div></div>

Ok, sorry it took so long.

Nosler Custom loaded ammo with 140gr AccuBond

.309

Nosler brass fired in my rifle (not sure how it was chambered 16 years ago)

.316-.3165

FC 280 rem brass fired in my rifle

.317-.3175

RP 280 rem brass fired in my rifle

.3175-.318

Neck walls of the Nolser brass (measured with Sinclair neck mic)

.0125-.0135

Fed Cart and Remington 280 Rem brass fire formed in my rifle:

.013-.014

Just for comparison:

Hornady light mag 280 remington loaded in RP brass with 139gr SST moly neck diameter:

.311

Federal Premium 280 Remington loaded in FC brass with 140gr Barns tripple shock:

.310

Hope this helps. Let me know if you need anything else.

Joe

 

[Ackley Improved]

Re: 280AI Neck and dies

Mate

Thanks for the info... that is all I need! Definitely 0.308" bushing it is!!!

So seems most is around the 0.310-0.311" which makes life easy.

Thanks again!!!

If anybody else has 280 loaded rounds from different manufactures post them up also. Will be good to see across the board with all brands!

Cheers

 

[Country]

Re: 280AI Neck and dies

So when you strike a case neck that measures .317 you are going to size it down with a .308 bushing ? Down .009 !!

 

[Ackley Improved]

Re: 280AI Neck and dies

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Country</div><div class="ubbcode-body">So when you strike a case neck that measures .317 you are going to size it down with a .308 bushing ? Down .009 !!

</div></div>

Wont fit in the chamber...... if anything gets any bigger I will neck turn a little off!!!

If brass brand increased its neck size that much, I would be asking questions about that manufacturer... unless it was a deliberate reason why the manufacturer did increase the size.

A 0.0308" bushing will work for most brass as per measurements above and from PM's..

Thanks guys who PM'd and posted in this thread. Info on the sizes is great!