• This Forum is for adults 18 years of age or over. By continuing to use this Forum you are confirming that you are 18 or older. No content shall be viewed by any person under 18 in California.

250 savage Ackley vs 25x47 Lapua?

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?
 
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.
 
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.
 
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.
 
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
 
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.
 
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.
 
.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.
-
 

Upgrades & Donations

This Forum's expenses are primarily paid by member contributions. You can upgrade your Forum membership in seconds. Gold and Silver members get unlimited FREE classifieds for one year. Gold members can upload custom avatars.


Click Upgrade Membership Button ABOVE to get Gold or Silver Status.

You can also donate any amount, large or small, with the button below. Include your Forum Name in the PayPal Notes field.


To DONATE by CHECK, or make a recurring donation, CLICK HERE to learn how.

Forum statistics

Threads
165,886
Messages
2,205,395
Members
79,189
Latest member
Kydama1337
Back
Top