[batjka]

No. Modern non-corrosive 9mm Largo was loaded for sub machine guns - it is at the outside range of usable for the Modelo Supers, and definately not for the Astra 400s and earlier Campo Giro.

You all can believe what you want and stick a piece of dynamite in your gun for all I care, but I stick to the adage : Use only what the gun was designed for.

I don't know about the "outside range of usable", but the ammo boxes clearly state "for pistols and submachine guns". Therefore, the same ammo was meant for both and is certainly safe.

 

[Wadwizard]

Mil-Spec 9mm Largo ammo is 9mm Largo (9mm Bergman-Bayard)...it always has been and always will be loaded the same. Sub-gun loadings are a myth. Its what was used in the original and oldest pistol using that cartridge, through the M400, The Model A, Super A's, etc. If anything, the modern ammo spec is down-loaded. Whether or not I'd shoot anything at all in a collector grade pistol is another matter.

 

[Wadwizard]

My question is: is there any reason that the Super A (9mmx23 Largo) is not safe to fire with .38 Super (also a 9X23) ammo pressure ammo? My observation is that the same Super Star A gun chambered in 9mm Luger (i.e., a Super B) works almost the same pressures as the.38 Super. There are a number of 9X23 rounds that differ only superficially in case specs (.38 Super, .38 ACP, 9mm Steyr. 9x23 Winchester) but only the Winchester operates at higher pressure (and should definitely not be used in the Star Super A).

If it's OK with the 9mm Luger pressures, why not with the .38 Super?

Can anyone address this question? I've asked it several times and no one has ever responded. Thanks.

 

[MikeWilliamson]

Can anyone address this question? I've asked it several times and no one has ever responded. Thanks.

I realize I'm resurrecting a zombie thread, but to answer your question:

Same mass and velocity at the muzzle does not necessarily mean the same pressure curve inside the breech. You need to compare the propellant chemistry.

Use the right ammo for the right gun, not a workaround.

 

[ibmikey]

This same issue returns time and time again, some people just have to put the wrong ammunition in a firearm justifying their decision in a multitude of ways. Use ammunition the pistol was designed for! .38 Auto is not 38 Super.....9mm Largo is not Super or 9X23...9mm is not for for shooting in the Largo pistols “because my friend does it”. Use correct ammo in your firearms and save your fingers and pistols.

 

[musketshooter]

Starline 38 Comp is the same as 9MM largo brass. It is basically a rimless 38 super. I load it for my Largo pistols and Destroyer carbine.

 

[MikeWilliamson]

Starline 38 Comp is the same as 9MM largo brass. It is basically a rimless 38 super. I load it for my Largo pistols and Destroyer carbine.

Brass, yes. The load is different, though.

Just be sure to keep the loaded ammo separate.

I use .303 Brit brass for my 6.5 Dutch carbine, and it's necked down. No risk there--.303 won't fit in the Dutch, and Dutch in the .303 won't do much of anything.

But I have a box for regular .45-70, and another box marked TRAPDOOR ONLY for my original Trapdoor.

 

[MikeWilliamson]

I came looking for this thread because a dealer at my local show last weekend had several boxes of 9X23 that were Sharpied as "9mm Largo." I explained the difference in load and he just sort of shrugged. I hope no one blows a Modelo 400 up.

 

[ibmikey]

What Mike said brass is not loaded 38 Super ammo, I simply cautioned about the interchange of loaded ammo. We all know the pitfalls of allowing 300 Blackout in proximity to 5.56, although basically the same case one will fire while the other make spaghetti of your AR!

 

[moulainville]

Musketshooter,

The 38 Comp brass, does work perfectly for loading 9mm Largo rounds. The increased case head thickness over that of the original Largo cases and a margin of safety as well. It functions perfectly in my Model A and Super A, however, I have had extraction issues when using the 38 Comp brass loads in my Destroyer Carbine. Seems to be an issue with the Destroyer extractor getting the proper grip on the 38 Comp rim. Anyone else experience this?
And back to the thread question, NO, ABSOLUTELY NO. Do not use 9x23 or 38 Super in a 9mm Largo chambered pistol. Especially if you like your pistol.