What Caliber is this Sako Rifle? 7.62 x 1.579 Squared

[Kitten Cannons]

Found this Sako rifle on Gunbroker and can't figure out what it shoots. Seller doesn't know either, it's a consignment off an estate. Wondering if someone out there has the knowledge it's stamped 7. 62 x 1.579 Squared, meaning there's a little 2 up past the 9. Pics included, Thanks in advance!

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[P7M13]

Curious minds want to know.
Buy it and tell us the secret!

GunBroker.com - Error

 

[po18guy]

Barnes' book "Cartridges of the World" will know. Otherwise, a chamber cast. This "might" be it: .308×1.5-inch Barnes - Wikipedia

 

[Kitten Cannons]

Definitely a wildcat, I think we're getting closer though

 

[Mark McMahon]

7.62 is 30 caliber, is that what your asking?

 

[P7M13]

Good call @po18guy .
Check this out :

30BR Guide - 30 BR Benchrest Lapua Cartridge with Reloading, .308 Bullet, Accuracy, and Competition Info

Guide to 30BR benchrest BR shooting with .308 30 caliber bullet, reloading, Lapua brass and 30 BR accuracy. IBS Champ Joe Entrekin, Hunter Class Champion shooter Al Nyhus, and BIB bullet maker Randy Robinett, B.I.B. 6mmBR.com for 6mm BR Benchrest shooting, with 6BR FAQ, 30BR History,30BR...

www.6mmbr.com

The squared might be a footnote/asterisk.
Ideally it would also have a 35° or 40° shoulder.

 

[orygun]

I'll bet it's a smart a$$es way to say 30-06 or it's something very similar.
1.579 squared is 2.493241 A 30-06 case is 2.484.

That's a nice looking rifle.

 

[DLS]

Only a chamber cast will tell you for sure.

 

[tac]

^ THIS.

 

[DLS]

One might consider casting the chamber on any new to you firearm that you don't have some level of certainty as to clambering, especially since it is so easy to do.

I once picked up a nice .280 Remington only to find it had been doctored into an Ackley Improved, without any indication on the gun.

Lucky for me that the cases fire formed without any issues (would have preferred the bullets jammed into the lands if doing this on purpose) and ...

Lucky for me the Ackley Improved is actually a worthwhile customization and made the rifle more valuable.

But ...

The moral of the story is you really don't know what you have until you have some level of confirmation.

 

[orygun]

Only a chamber cast will tell you for sure.

Agreed. My theory would be best fit by 1.577 squared, anyway.
It's an interesting way to mark a barrel.

Edit. the 30-06 case OAL is 2.494. The trim to length is 2.484.
Brings me back to where my theory started...

 

[tac]

Found this Sako rifle on Gunbroker and can't figure out what it shoots. Seller doesn't know either, it's a consignment off an estate. Wondering if someone out there has the knowledge it's stamped 7.View attachment 770548View attachment 77054962 x 1.579 Squared, meaning there's a little 2 up past the 9. Pics included, Thanks in advance!View attachment 770548View attachment 770549

With your persimmon I'd like to repost this over on gunboards.

 

[tac]

Done.

We''ll what, if anything, the mavens over there come up with. A few of them are in the SAKO Collectors Association of America.

Me, I have no idea - I've never seen ANYTHING like that before, anywhere. I DO know that I wouldn't be buying it.

 

[edzz]

Just a guess here. The .30-06 Springfield cartridge is, 7.62×63mm in metric notation. 1.577 ^2 = 63.3283214mm. So...I'm guessing either .30-06 or some sort of .30-06 "improved".

Edit: Looks like I was a bit slow with this post, I'll blame my horse.

 

[tac]

Caliber notation is usually applied in the commonly-used designations. Even those countries who make rifles in .30-06 mark them as such. Let's see what turns up from the SACoUSA.

EDIT>

I'm betting a pound to a pinch of parrot poop that that 'cypher' was done right there in the USA by a smart-a&&. That marking would be illegal in ANY of the CIP signaturee nations, currently numbering fourteen, who manufacture firearms. Finland, home of SAKO, is one such member.

 

[P7M13]

@tac, it's already posted over in Sako Collectors assn. That's where I found the link above.

 

[tac]

I am betabed. Most strengthly.

 

[P7M13]

I am betabed. Most strengthly.

No idea what that means, but you're a stud, albeit old, and a walking Britannica as far as firearm knowledge.

 

[Stomper]

No idea what that means, but you're a stud, albeit old, and a walking Britannica as far as firearm knowledge.

Did you just infer the good fellow is a, "bitanicasaurus"?

 

[P7M13]

Did you just infer the good fellow is a, "bitanicasaurus"?

Yep, here he is in his audition for a role in the "Prisoner of Azkaban".