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Old 01-28-2010, 22:57   #1
Tmygun
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400 CorBon...How does it stack up against the 10mm???

My brother was considering a 400 Corbon barrel for his SA 1911. Is it really in the 10mm performance range. It seems intersting, since they say all you need to do is drop the barrel in, and 45acp brass is everywhere.
What say ye???

Tmygun

Last edited by Tmygun; 01-28-2010 at 23:50..
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Old 01-28-2010, 23:18   #2
bfoosh006
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Sounds like an interesting conversion, the only drawback ( a major one to me ) is the case is a Bottle-Neck cartridge and as such it isn't as "easy" to reload. You will have to lube each case, I don't think anyone makes a carbide die for it.
And while not an answer about the 400 Corbon, you should mention the 460 Rowland to him. Check the " 460 Rowland" post. It is far "easier/better"... ( subject to your opinion...)

Last edited by bfoosh006; 01-29-2010 at 09:48..
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Old 01-29-2010, 03:01   #3
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There's also the 40 super he could look at.
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Old 01-29-2010, 09:03   #4
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[QUOTE=bfoosh006;14641682]Souunds like an interesting conversion, the only drawback ( a major one to me ) is the case is a Bottle-Neck cartridge and as such it isn't as "easy" to reload. You will have to lube each case, I don't think anyone makes a carbide die for it.
And while not an answer about the 400 Corbon, you should mention the 460 Rowland to him. Check the " 460 Rowland" post. It is far "easier/better"... ( subject to your opinion...)[/QUOTE/]


Run your fired .400 Corbon cases through a .45ACP carbide die first then the Corbon resizer. No lube necessary.

Reloading the round is pretty straight forward. The neck is short and bullets need to be crimped by some means. Most .400 bullets don't have a cannelure so I use a Dillon taper crimp die for the last step. So far, so good.

The .400 Corbon can approximate the 10mm but not equal or exceed it. I love shooting mine for varmints and such. The Sierra 135grn.HP stoked to 1400fps or so is accurate and deadly.

I use a 20lb. spring with the Corbon barrel. Keeps brass from flying into the next county. Cases can be made from stock .45ACP brass. But if you want to run the round hot get some .400 Corbon brass from Starline. It has a small primer pocket and thicker walls at the base. I use Remington 7.5s and get better acccuracy with lower pressure(s). You can buy 100 count bags from Dillon for $26.

A fun round if you've got a 1911, SIG P220, or G21 to begin with. Makes a good gun that much more versatile.
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Old 01-29-2010, 09:49   #5
bfoosh006
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Interesting about the .45 die, I had not thought of that.
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Old 01-29-2010, 11:40   #6
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Thanks guys, I'll pass this info on to my brother.

Tmygun
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Old 01-29-2010, 21:49   #7
Doc Pathfinder
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The 400 CorBon is at it's best with 135 to 155 grain bullets. The 10mm works great with 180 grainers. That's where the 10mm would have an advantage over the 400 CorBon but I do love shooting those little 135's in my converted G-21sf.
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Old 01-30-2010, 15:57   #8
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just started reloading for 400cb. It is fun to shoot 40cal target 155gr berry bullets out of my G30. Plated and lead bullets are easier for me to load. Jacketed bullets have been a little harder....neck tension,crimp,collasped shoulders, Each bullet needs to be checked in barrels chamber(case-chamber check) Finding and buying factory ammo will cost too much.
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Old 02-01-2010, 17:20   #9
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If he reloads, I would go with the 40 Super over the 400 Corbon. I have shot thousands of rounds of both, and the 40 Super is far superior. To my knowledge it is the most powerful round ever chambered in a semi-auto 1911.
It will push a 165gr bullet to 1600fps, for 940 foot pounds of energy.

Tony
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Old 02-02-2010, 02:21   #10
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150gr Sierra, .400 Corbon barrel in a Springer GI;

Caliber Corner

Small pistol primer, Starline brass . . . nice performing 155gr Gold Dot hits pretty hard;

Caliber Corner

I also use a carbide .45 auto sizing die, full turn roll crimp.

Since 135gr to 165gr bullets are designed for .40 S&W velocities, not much, if anything, is gained by achieving uber velocities.

Bob
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Old 02-02-2010, 04:48   #11
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I thought 400 Corbon was designed to use regular reformed 45acp brass. Can you get better performance using the Starline brass? I'm assuming the Starline brass is made stronger because of the use of small primers.
That is some nice looking performance. Nothing like a well formed mushroom.
Thanks for all the input.

Tmygun
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Old 02-02-2010, 11:18   #12
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Quote:
Originally Posted by Tmygun View Post
I thought 400 Corbon was designed to use regular reformed 45acp brass. Can you get better performance using the Starline brass? I'm assuming the Starline brass is made stronger because of the use of small primers.
That is some nice looking performance. Nothing like a well formed mushroom.
Thanks for all the input.

Tmygun
Grafs usually has starline 400cb brass. I dont know if youll get better performance,maybe others can answer. They are a +p 45 case necked down and use smallpistol primers. 45super brass might be a little stronger. I read where you shouldnt use anything but +p,super,and 400cb brass for hotter loads. I've had problems with the first round jamming while chambering in my g30's 10rd mag but fixed this by using their latest hi cap follower and a new mag spring. I've been using the factoty recoil spring.
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Old 02-02-2010, 11:26   #13
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[QUOTE=Glolt20-91
I also use a carbide .45 auto sizing die, full turn roll crimp.
:[/QUOTE]

the only way I've been able to go a full turn on a lee BN factory or regular crimp die is to cut a deep cannelure with a Buffalo Arms tool. Otherwise it crushes my gold dots. Whats your secret?
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Old 02-02-2010, 13:35   #14
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Quote:
Originally Posted by Snapper2 View Post
the only way I've been able to go a full turn on a lee BN factory or regular crimp die is to cut a deep cannelure with a Buffalo Arms tool. Otherwise it crushes my gold dots. Whats your secret?
I don't know what to say, no crushed GDs with the Lee factory crimp die @ one turn.

Bob
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Old 02-02-2010, 13:50   #15
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Quote:
Originally Posted by Snapper2 View Post
Grafs usually has starline 400cb brass. I dont know if youll get better performance,maybe others can answer. They are a +p 45 case necked down and use smallpistol primers. 45super brass might be a little stronger. I read where you shouldnt use anything but +p,super,and 400cb brass for hotter loads. I've had problems with the first round jamming while chambering in my g30's 10rd mag but fixed this by using their latest hi cap follower and a new mag spring. I've been using the factoty recoil spring.
I don't know if there's a performance difference between .45 brass and .400 Corbon brass, but, since .400 Corbon has a little more case capacity than 10mm; it takes about .1gr to .2grs more powder in the .400 Corbon compared to the 10mm case to equal 10mm velocities.

Brass can be ordered directly from Starline;

http://www.starlinebrass.com/index.p...7a7b6e9266b233

By changing to small pistol primers (WSP recommended), small rifle primers (Remington 7 1/2 recommended) can also be used.

Bob
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Old 02-02-2010, 16:27   #16
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Originally Posted by Glolt20-91 View Post
I don't know what to say, no crushed GDs with the Lee factory crimp die @ one turn.

Bob
ok thanks Bob, I'm calling the .010 groove it cuts crushing. Maybe not. I'm just use to loading straight wall where an overcrimp effects headspace and accuracy. I guess this is the reason they recommend an OAL of no more than 1.224( the crimp might effect accuracy if its in the middle of the bullet). Overall I guess I've been lucky not to have bullet setback with a 1/2-3/4 turn crimp depending on the hardness of the bullet. Like what you said in a post above, its probably better not to chase 10mm velocities. Maybe a fast 40sw with lower pressures should be the goal.
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