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What's your idea of the advantage of 10mm over .400 Corbon...or the reverse?

Seems to me that the .400 Corbon is a cheap, easy conversion that offers the same ballistic package.
 

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New barrel required in a .45 ACP pistol

The .400 Corbon can't be shot in a normal .40 caliber gun. It is a necked down .45 case with a .40 caliber bullet. Here is some info from the Corbon website:

Q. Can I use your 400 CorBon ammo in my 40 S&W pistol?
A. No. It is an entirely different cartridge that happens to use the same .400" diameter bullet. Only 45ACP pistols can be converted to 400 CorBon via a new barrel chambered in 400 CorBon.

Q. Just what is the 400 CorBon anyway?
A. The 400 CorBon is a .45ACP necked down to .40 caliber (10 mm). Most any .45ACP can be easily converted to the the 400 CorBon with a simple barrel change. You can use the same magazine, rails and springs. And your gun can be just as easily converted back to the original .45ACP. Performance of the 400 CorBon exceeds the 10mm or 357 Magnum.

Q. Can any .45ACP be converted to 400 CorBon?
A. Just about. 1911A1's of all makes, Glock 21's, SIG 220's, S&W models - M645, M745, M4506, M4516, H&K USP's, Para-Ordnance, Ruger P90 to name the most popular. Don't convert old US Army .45's, they deserve an honored rest.

Q. You mean all I need to convert my 45 to 400 COR-BON is a new barrel chambered in .400?
A. This usually is it for Glock 21, or SIG P220 pistols. The 1911 type .45’s may benefit from an 18-20lb. spring and a few need a 22-24lb. spring. Older 1911’s (series 70 etc.) may need an oversize firing pin to fit their oversize firing pin orifice plus a new firing pin spring. Don’t forget, 1911 guns have been made since the dawn of time by a jillion companies and their specifications vary all over the map. It’s up to you and your gunsmith to set up your 400 pistol properly; COR-BON has no control over it and we are not responsible for it. We manufacture 400 COR-BON cartridges to extremely stringent standards and these cartridges function perfectly in all our factory test guns which include several 1911 pistols, Glock 21’s, SIG 220’s.
 

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The .400 Cor Bon has the one pistol, two caliber thing going for it. For some reason though I hear it's not as reliable feed-wise in a 1911 as it is on other platforms. Which is strange because bottle necked cartridges are supposed to promote extra feed reliability like the .357 SIG.

I'd love to turn a SIG 220 into .400 Cor Bon but lately barrels are hard to find. Seems to be the only way to get a 10mm SIG !

If you really want a 10mm then buy a Kimber or a Dan Wesson or convert a .40 cal 1911 with a barrel and springs.

Lastly, the 10mm has more potential in the fact that it can be loaded hotter than the .400 Cor Bon but that being said, I'm still looking for an extended, ported 220 barrel in .400...
 

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If you're going to play with .400 Cor-Bon, be careful about setback!

 

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I have a .400 CorBon barrel for my 1911. I got it from Jarvis Inc. Hamilton MT It is a "Drop-In" Peter Pi came up with the .400 CorBon cartridge in
1997. It is a necked down .45 ACP to .40 with a 25 deg. angle shoulder. Note: on Jan 1 2000 I believe Corbon changed the case to use a small pistol
primer instead of the large pistol primer used in the .45 ACP case. I have heard that some loads/powder/bullet weight combos use small rifle primers and others use small pistol primers, why I do not know and CorBon ain't telling.

CorBon has not submitted .400 CorBOn to SAAMI for their blessing but some
estimate that it is loaded to around 26,500 PSI vs standard
.45 ACP 21,000 .45 ACP +P 23,000 but even so it is way below
.40 S&W as well as 10MM AUto pressures which are in the 35,000 or
more pressure ranges.

.400 CorBon has the advantage of being able to switch back and
forth tween it and .45 ACP. I think 10MM AUto with the long straight
case gains advantage over the .400 CorBon as well as .40 S&W when iit
comes to heavier 170 DPX, 180 & 200 grain bullets due to the short neck
of the .400 CorBon and the short case of the .40 S&W.

I'll probably keep my steel frame 1911 as a dedicated platform for the
.400 CorBon and get another S&W 1911 with the scandium frame.

I think CorBon ammo a bit spendy and found the following loads at
Reeds Ammunition & Research - Oklahoma CIty OK. check online.
.400 CorBon
155 gr. SPeer Gold DOt JHP @ 1400 FPS
155 gr. Hornady XTP JHP @ 1,360 FPS
 

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advantage: 10mm

I had a 10mm gun, and I still have (and rarely use) a 400 CorBon barrel (from Clark; nice unit).

The 10mm can exceed the 400 in every way, from same-weight velocity to handling heavier bullets.

Both 'hobby' cartridges, IMNSHO.
 

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S&W has brought back the N-frame 610 in a 3 7/8 inch BBl. as well as
a 6 1/2" Bbl. version for the 2008 catalogue.

Hardly a "Hobbyist" - imho I think Corbon waters
down their 10MM ballistics to promote the .400 CorBon.
 

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another length?

Have shot the 3", 4", 5", and 6" versions; ideal 10mm platform.
But I have no idea why a "3 7/8""......

Another issue doesn't alter my statement; neither are mainstream cartridges.
 

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Have shot the 3", 4", 5", and 6" versions; ideal 10mm platform.
But I have no idea why a "3 7/8""......

.
IMO - with the additional S&W 625 PC being offered with a
5 1/4" BBl. I suspect whoever cuts barrels either has aging eyes
or a substance abuse problem that S&W is failing to
address.... insert confused smiley of exasperation
 

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I have a .400 CorBon barrel for my 1911. I got it from Jarvis Inc. Hamilton MT It is a "Drop-In" Peter Pi came up with the .400 CorBon cartridge in
1997. It is a necked down .45 ACP to .40 with a 25 deg. angle shoulder. Note: on Jan 1 2000 I believe Corbon changed the case to use a small pistol
primer instead of the large pistol primer used in the .45 ACP case. I have heard that some loads/powder/bullet weight combos use small rifle primers and others use small pistol primers, why I do not know and CorBon ain't telling.

CorBon has not submitted .400 CorBOn to SAAMI for their blessing but some
estimate that it is loaded to around 26,500 PSI vs standard
.45 ACP 21,000 .45 ACP +P 23,000 but even so it is way below
.40 S&W as well as 10MM AUto pressures which are in the 35,000 or
more pressure ranges.

.400 CorBon has the advantage of being able to switch back and
forth tween it and .45 ACP. I think 10MM AUto with the long straight
case gains advantage over the .400 CorBon as well as .40 S&W when iit
comes to heavier 170 DPX, 180 & 200 grain bullets due to the short neck
of the .400 CorBon and the short case of the .40 S&W.

I'll probably keep my steel frame 1911 as a dedicated platform for the
.400 CorBon and get another S&W 1911 with the scandium frame.

I think CorBon ammo a bit spendy and found the following loads at
Reeds Ammunition & Research - Oklahoma CIty OK. check online.
.400 CorBon
155 gr. SPeer Gold DOt JHP @ 1400 FPS
155 gr. Hornady XTP JHP @ 1,360 FPS

We submitted the 400 COR-BON to SAAMI and it was approved 2 years ago.

Pressures for the 400 are in the 23,000 PSI range.
 

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As mentioned above, the .400 does not offer a huge ballistic advantage over the 10mm (almost none over a few factory loads and some select *safe* handloads).

But it does offer the chance to shoot that type of ballistics in a regular .45 Auto. I did not know the pressure, thanks Mike. That makes it even more attractive.

Jim H.
 

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and

I think-but-cannot-prove that the 400 CorBon cartridge will prove exceptionally accurate when fired from 'converted' 1911 platforms (stiff tube, 45-sized on the outside, but only 40-sized on the inside....)

It certainly is in mine, and in a few others I know of....

Thank you CorBon for the pressure info.
 

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We submitted the 400 COR-BON to SAAMI and it was approved 2 years ago.

Pressures for the 400 are in the 23,000 PSI range.
Cool! Now get to pushing it again! Barrels are scarce!!! :)
 

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The 400 is a great caliber.
At the low pressure it approaches 10 mm specs
without beating up your gun with high psi loads that batter frames and rails
My SA with a bar-sto barrel is a tack driver
I think of it as a 400 BR!
 

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400 corbon Ruger P90

I love the 400 corbon but darn ammo costs a fortune. I have it in a ruger p90 and it is a hot round for sure.
 
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