250 savage Ackley vs 25x47 Lapua?

[Philly]

I plan on building a 25 cal rifle soon and was planning on the 25x47 but then stumbled upon a used 250 savage Ackley that I might purchase instead. Anyone have opinions on these? Is. there a big performance difference or just splitting hairs?

 

[Twicepop]

The 250 Savage AI has a slightly longer case, 1.912" vs 1.850" for the 25X47. The Ackley case has a 40 degree shoulder angle and I believe the family of the 47MM Lapua cases use a 35 degree shoulder angle. Not a great amount of differences. I'm guessing that any differences between the two wouldn't amount to more than about 100-150 fps with any bullet weight.

 

[std7mag]

What type of shooting are you planning for it?
The AI may have a 1:10 twist barrel. Limiting you to 120gr lead core bullets.
About 90gr monos.
Sure, you could rebarrel, but another added cost.

 

[WayneShaw]

Do a search here, I think Randy Robinette has made a comparison of these two.

 

[Hohn]

I plan on building a 25 cal rifle soon and was planning on the 25x47 but then stumbled upon a used 250 savage Ackley that I might purchase instead. Anyone have opinions on these? Is. there a big performance difference or just splitting hairs?

Isn’t it always about splitting hairs? 25 cal is only 0.007” smaller than 6.5/.264.

I’d buy the AI and try that if I had to have a quarter bore. If I’m buying x47 brass, just build a 6.5x47.

 

[boltfluter]

If wanting to run stout loads, the 6.5x47 brass is very stout. What with small primers and Lapua brass, it is very hard to beat for longevity.

Paul

 

[Philly]

What type of shooting are you planning for it?
The AI may have a 1:10 twist barrel. Limiting you to 120gr lead core bullets.
About 90gr monos.
Sure, you could rebarrel, but another added cost.

It will be a new build

 

[Philly]

Isn’t it always about splitting hairs? 25 cal is only 0.007” smaller than 6.5/.264.

I’d buy the AI and try that if I had to have a quarter bore. If I’m buying x47 brass, just build a 6.5x47.

I have a 6.5x47. Just have the bug for that .25, you know

 

[shortgrass]

.250 Savage brass is almost non-existent.

 

[Philly]

.250 Savage brass is almost non-existent.

Good to know. I haven’t even started to look for it. I have a little x 47 lapua brass. Maybe that’s my answer.

 

[std7mag]

But Lapua makes 22-250 brass.
Just say'n....

 

[SeabeeKen]

I have a 250AI. its a good round but the neck shortens some after forming. It is accurate. If I had it to do over, Id do a 25XC or 25x47L. The 25 is my favorite caliber. Be sure you can get dies first

 

[AckleymanII]

throating will be critical for either, case capacity is limited. Look before you leep

 

[SweaterDood]

True…so which is best? What’s more speaking? I’m open to building either one.

Necking brass up or down calibers seems to be generally considered less than ideal for uniformity, therefor accuracy. I almost don’t consider the 0.007” change from 6.5x47L to be outside of the realm of general sizing, especially considering that you only do it once...

I have a 25x47L and think highly of it so far.

Use the Blackjack no-turn spec reamer from JGS / Manson, 7.5tw barrel, Blackjack 131 / Berger 135, Lapua / Alpha brass. Basically load as if it is a 140gr 6.5x47L and enjoy the extra velocity & lower recoil.

 

[potatojudge]

You can make 250 AI brass from Creedmoor brass as well.

I went with AI just because I already had AI dies for a pistol I shoot. I also have a 25CM barrel on order. Both 1:7ish twist

The x47 is the easier option if you're buying dies new.

The #1 difference between buying a 250AI off the shelf and building your own (be it AI, x47, or CM) is twist rate. The off the shelf option is likely 1:10, a build really should be 1:7-7.5 and throated for 135s.

So for the cases themselves, splitting hairs. For dies and twist, build a x47.

 

[greisdor]

u should look at the 25-08 too. I would do a 25-08 AI

 

[greisdor]

.25-08 (.25 Souper)

 

[Philly]

.25-08 (.25 Souper)

So a bushing .308 die is all you need to load? Looks like it should be a nice cartridge

 

[Brians356]

.250 Savage brass is almost non-existent.

You don't need 250 Savage brass! You're much better off starting with 22-250 which is ubiquitous and available as premium e.g. Lapua. I fireform it "bulletless" but if you must use bullets to fireform, just run a good expander through the necks first.
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[Brians356]

The Ackley case has a 40 degree shoulder angle

A lot of 250 AIs have 30-deg or 35-deg shoulders. RCBS promoted the 30-deg version.
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