6.5-280 Ackley Improved?

[Edd]

Can I just neck-down Nosler .280 AI brass (new SAAMI spec) for my .25-06 AI, or is the .25-06 AI chamber .014" longer like the older Ackley .280 AI chamber is?

The 25-06 AI chamber will be shorter than the 280 AI chamber.

 

[MudRunner2005]

The 25-06 AI chamber will be shorter than the 280 AI chamber.

Good! So if I run them through a FL .25-06 AI sizing die before-hand I should be fine then. Good news everyone, forming .25-06 AI shoulders has now become easy!

Now if only Norma would make some factory .25-06 AI stamped brass ready from the factory, that would be sweet!

 

[Michael O'Connor]

Ahh, ok thanks. I have discussed with him the 270 Sherman but not the 6.5. In the article, it mentioned Nosler 280 AI brass as the parent case and easily necking it down to 6.5mm.

RWS makes good 270 Win. brass, too !

 

[elkaholic]

RWS makes good 270 Win. brass, too !

They sure do!!

 

[elkaholic]

Good! So if I run them through a FL .25-06 AI sizing die before-hand I should be fine then. Good news everyone, forming .25-06 AI shoulders has now become easy!

Now if only Norma would make some factory .25-06 AI stamped brass ready from the factory, that would be sweet!

Pushing a 40 degree shoulder back is not as easy as you think! Especially pushing it some .050".

 

[MudRunner2005]

Pushing a 40 degree shoulder back is not as easy as you think! Especially pushing it some .050".

Rich, that post was from 2013... I've since figured out my perfect process. I was actually referencing necking SAAMI .270 Win brass down to fire-form into .25-06 AI, not pushing the .25-06 AI 40º shoulder back.

 

[elkaholic]

Rich, that post was from 2013... I've since figured out my perfect process. I was actually referencing necking SAAMI .270 Win brass down to fire-form into .25-06 AI, not pushing the .25-06 AI 40º shoulder back.

Hey, that's only 5 years I thought you were trying to push back a 280 a.i. to 25 a.i. tough job!

 

[MudRunner2005]

Hey, that's only 5 years I thought you were trying to push back a 280 a.i. to 25 a.i. tough job!

Nah, I tried that early on in the process, but it was a no-go. Kept getting muffin tops at the wall/shoulder junction... So I decided to with the .270 Win brass and start from there. EXPONENTIALLY simpler.

 

[CBH Australia]

@elkaholic can you enlighten me on the Sherman cartridge please.

I have a .280a.i and now looking into a 6.5 cal but .25-06 variants have been considered..

 

[The Oregonian]

@elkaholic can you enlighten me on the Sherman cartridge please.

I have a .280a.i and now looking into a 6.5 cal but .25-06 variants have been considered..

Link

 

[QuietTexan]

The 6.5 Sherman is basically a 6.5 Gibbs reworked to a longer neck with same/more case capacity. I use the Gibbs design, but because I had it all before I knew about Rich. His offerings are the easy button to get wildcat performance without the hassle. Just fantastic stuff.

If I were doing a new 6.5 right now I think it would be hard to pass on the 6.5 PRC/SI, but the 6.5 Max all his design and is supposed to be a beast. I run the 30 Sherman currently, but really want a 6 Max next.