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Old 10-06-2013, 04:33 AM   #1
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Default 9mm Largo.

I'm considering buying an Astra 400 in 9mm Largo and am wondering about the availability of ammunition for it?
Also, I've heard that it can fire 9x23 Winchester, 9mm Steyr, 9mm Luger, .38 ACP, and .380 ACP. Information on that would be much appreciated.

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Old 10-06-2013, 04:45 AM   #2
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I've heard that the Astra 400 is "multi caliber," but it can only accept about 3 different 9mm versions, and I think it can be converted to another with a chamber sleeve. I don't know about 9mm Luger (I think I read somewhere that it's too short), and definitely not .380 or .32 acp.
Now the Medusa, that's a different story.

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Old 10-06-2013, 04:49 AM   #3
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9mm largo is a lower pressure round than all of the ones you mentioned other than the 38 and 380. It also head spaces off the case mouth.

Firing 9mm or 9x23w is pretty unsafe in that chambering. Firing any cartridge not designed for it isn't wise. The case of the 9x23w can be used to load for the largo but largo charges must be used and must be kept under 10% max charge weight due to the smaller volume of the 9x23w.

Unless your a handloader and looking for a collectable shooter avoid it.

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Old 10-06-2013, 04:50 AM   #4
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Quote:
Originally Posted by Gizord1 View Post
Now the Medusa, that's a different story.
I've seen one of those in a video. They look awesome and seem like they'd be a great survival gun.
Thanks for the response.
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Old 10-06-2013, 04:52 AM   #5
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Quote:
Originally Posted by JonM View Post
9mm largo is a lower pressure round than all of the ones you mentioned other than the 38 and 380. It also head spaces off the case mouth.

Firing 9mm or 9x23w is pretty unsafe in that chambering. Firing any cartridge not designed for it isn't wise. The case of the 9x23w can be used to load for the largo but largo charges must be used and must be kept under 10% max charge weight due to the smaller volume of the 9x23w.

Unless your a handloader and looking for a collectable shooter avoid it.
Thanks for the info.
Know anything about factory or surplus ammo 9mm Largo?
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Old 10-06-2013, 04:53 AM   #6
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The reason the largo is a dead cartridge is because 9mm outclasses it in a more useful size. 9mm packs more punch so militaries have gone to that over pretty much all the turn of the century .357 loadings.

Factory and surplus are pretty much nonexistant. All supplies of surplus dried up in the 80's

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Old 10-06-2013, 05:01 AM   #7
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Yep. What he said. ^^^^

http://www.9mmlargo.com/400/index.htm

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Old 10-06-2013, 05:04 AM   #8
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Quote:
Originally Posted by JonM View Post
The reason the largo is a dead cartridge is because 9mm outclasses it in a more useful size. 9mm packs more punch so militaries have gone to that over pretty much all the turn of the century .357 loadings.

Factory and surplus are pretty much nonexistant. All supplies of surplus dried up in the 80's
Thanks for your help. I believe I'll pass up on it for now.
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Old 10-08-2013, 01:00 AM   #9
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George Nonte (for you young guys, a prolific shooter, reloader and writer in the 1960's and 70's) settled the question of the Model 400 being able to use multiple 9mm cartridges in a Gun Digest article in the 1970's. After testing all the various 9 mm cartridges, he found that only the 9mm Steyr was a viable replacement for 9 mm Largo. The 9mm Steyr and Largo are interchangeable due to the 9mm Steyr rim being slightly smaller than the
9 mm Largo (0.008") and the operating chamber pressure is in the 24,000-26,000 psi range. He also found that some of the Model 400's with loose slide tolerances would allow the .38 ACP rim to seat and safely fire.

Due to the larger rim of the 9 mm Largo, the Largo cartridge will not chamber in the Steyr pistol (the slide will not close)l.

The 9 X 23 mm Winchester operates at 45,000 cup; guaranteed to dismantle a Model 400 in short order. The .38 Super operating at 36,500 psi is also not safe to use in the Model 400 even though it will chamber and fire in some with loose tolerances.

For the reloader, .38 Super Competition (rimless) brass is available and will work for either the 9 mm Largo or 9mm Steyr pistols and the Destroyer 9 mm Largo carbines.

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Old 10-18-2013, 10:27 AM   #10
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A lot of misinformation in this thread...

Surplus 9mm Largo is currently on sale at Sarco. They charge $190/1000 for corrosive ammo and $300/1000 for non-corrosive. Unfortunately, ammo they claim is non-corrosive is indeed corrosive, so buy the cheaper stuff.

As far as velocities, you will get just over 1200fps from your Astra, which is on par with factory .38 Super. Don't forget that Astras are straight blowback and therefore are not nearly as strong as Star Supers, which are built like a tank. So do not fire .38 Super in them (or so they say)

Enjoy tour Astra in 9mm Largo, it's a great caliber.

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