.400 Corbon conversion?

[LowThudd]

Anyone shooting .400 Corbon? I have a desire for a 10mm, but the Corbon is pretty close, and should work in my Custom II. I am thinking of fitting a 6" Roto Barrel from Sarco, they are only $56. I have been reading "The Colt 45 Auto" manual, and I am pretty sure I am capable of fitting it.

Just wondering if anyone had experience with the round, or even these cheap Sarco/Roto barrels which I believe are made by Armscor.

[Sky_DiveR]

Don't know much about Sarco but I got my kit from Clark Custom. Have never found any ammo so I have to reload using 45ACP brass (finally found a use for small primered 45ACP cases ). Haven't tried new Starline Brass (not even sure if they still offer it).

If you reload, have Lee make you a custom FCD (~$25) so you don't get bullet setback. I would occasionally get setback with a taper crimp but I heard a roll crimp would solve that problem. Never tried that. I think the Lee dies have a taper crimp.

Also, if you have 45ACP carbide dies, run the brass though that first then you don't have to lube the brass to final size to 400 CorBon.

[LowThudd]

Don't know much about Sarco but I got my kit from Clark Custom. Have never found any ammo so I have to reload using 45ACP brass (finally found a use for small primered 45ACP cases ). Haven't tried new Starline Brass (not even sure if they still offer it).

If you reload, have Lee make you a custom FCD (~$25) so you don't get bullet setback. I would occasionally get setback with a taper crimp but I heard a roll crimp would solve that problem. Never tried that. I think the Lee dies have a taper crimp.

Also, if you have 45ACP carbide dies, run the brass though that first then you don't have to lube the brass to final size to 400 CorBon.

Ammo is available from a couple places. Undrwood makes their own with Starline brass, CorBon brand is available from midway, and sportsmans guide have some Corbon also.

https://www.underwoodammo.com/400-cor-bon/

http://www.midwayusa.com/product/326962/cor-bon-self-defense-ammunition-400-cor-bon-135-grain-jacketed-hollow-point-box-of-20

https://www.underwoodammo.com/400-cor-bon/

Seems like a fun caliber. Have you hunted with it?

[C.G.]

If anyone does have the .400 Corbon please do chime in. I've been thinking about a conversion barrel for my P220 for years now, but there is not much excitement about that round, at least on the internet.

[Sky_DiveR]

It is a fun round to shoot and reload. Haven't taken it out on a hunt. Stopped.hunting years ago.

[walmart_ar15]

400 corbon conversion

I did exactly this. Wanted a 10mm performance but not having many choices to pick from. And fun project to work on.

I also used the Sarco roto barrel, they are typically drop in, so min to no fitting required. Of course not as tight fitted as a custom job.

Hand load is way to go if u really want 10mm performance, otherwise typical commercial load will always fall short, unless compared to reduce 10mm reloads. If pushing the limits, make sure to use new Corbon brass or resize 45 Super brass. They are thicker walled to handle higher pressure. Normal 45 brass typically u do not want go above 45+ pressures. Always full size form ur case with a 45 die before resize and after sitting the bullet. Carbon has short neck, it can bulge the case sitting the bullet. One final resize in 45 die will ensure smooth function.

One can load to about 1250fps with 180grn. Make sure retune ur springs in 1911 type of gun, pretty much up weight for all the springs and a square firing pin stop. I have gotten mine to ~1500fps, but that is not for the faint of heart. U will have flat primer pockets. Do a search, I had reported my experience few years ago.

[Port Authority]

I wanted 10mm performance (short range) and now shoot 45 Supers.

185gr @ 1300fps, 200gr @ 1200fps and 230gr @ 1100fps.

Same barrel too (Glock 41).

Port

[Bad Caselaw]

Why not the .40 Super.?

LWD Barrel M/21L 40 Super

Caliber: 40 Super
Bullet Weight: 200 Grains
Bullet Style: Jacketed Hollow Point
Case Type: Brass

Ballistics Information:

Muzzle Velocity: 1400 fps
Muzzle Energy: 871 ft. lbs.

Caselaw

[walmart_ar15]

40 Super is very similar to 400 Corbon with improvement in longer case neck ( holds bullet better) and small primer pocket. Thicker overall case like the 45 Super. It has exact same OAL thus same case volume.

It is more "rare" compared to 400 Corbon thus less industry support in conversion parts. Also brass is dedicated, one cannot form it from common 45 ACP brass.

One can load up to the 40 Super performance with 400 Corbon but with formed 45 Super brass, but due to larger primer pocket, limits how hot one can go.

[LowThudd]

I did exactly this. Wanted a 10mm performance but not having many choices to pick from. And fun project to work on.

I also used the Sarco roto barrel, they are typically drop in, so min to no fitting required. Of course not as tight fitted as a custom job.

Hand load is way to go if u really want 10mm performance, otherwise typical commercial load will always fall short, unless compared to reduce 10mm reloads. If pushing the limits, make sure to use new Corbon brass or resize 45 Super brass. They are thicker walled to handle higher pressure. Normal 45 brass typically u do not want go above 45+ pressures. Always full size form ur case with a 45 die before resize and after sitting the bullet. Carbon has short neck, it can bulge the case sitting the bullet. One final resize in 45 die will ensure smooth function.

One can load to about 1250fps with 180grn. Make sure retune ur springs in 1911 type of gun, pretty much up weight for all the springs and a square firing pin stop. I have gotten mine to ~1500fps, but that is not for the faint of heart. U will have flat primer pockets. Do a search, I had reported my experience few years ago.

Thanks. Sounds like a plan, and a lot of fun.

I wanted 10mm performance (short range) and now shoot 45 Supers.

185gr @ 1300fps, 200gr @ 1200fps and 230gr @ 1100fps.

Same barrel too (Glock 41).

Port

Yep, I will be upping the springs in my Kimber so I can shoot .45 Super and .450 SMC. The .400 Corbon just seem like a fun round, and the lighter longer bullets can be fun, and even inexpensive. The barrel is cheap, and I want to learn to fit my own parts. Seems like as good a place to start as any.

Why not the .40 Super.?

LWD Barrel M/21L 40 Super

Caliber: 40 Super
Bullet Weight: 200 Grains
Bullet Style: Jacketed Hollow Point
Case Type: Brass

Ballistics Information:

Muzzle Velocity: 1400 fps
Muzzle Energy: 871 ft. lbs.

Caselaw

40 Super is very similar to 400 Corbon with improvement in longer case neck ( holds bullet better) and small primer pocket. Thicker overall case like the 45 Super. It has exact same OAL thus same case volume.

It is more "rare" compared to 400 Corbon thus less industry support in conversion parts. Also brass is dedicated, one cannot form it from common 45 ACP brass.

One can load up to the 40 Super performance with 400 Corbon but with formed 45 Super brass, but due to larger primer pocket, limits how hot one can go.

Yes, I may eventually ream the barrel to .40 super. That is a great round, and can even surpass 10mm ballistics. But I am going to start with the corbon, and get used to the reloading process with that, as they are similar.

[Carcassonne]

Anyone shooting .400 Corbon? I have a desire for a 10mm, but the Corbon is pretty close, and should work in my Custom II. I am thinking of fitting a 6" Roto Barrel from Sarco, they are only $56. I have been reading "The Colt 45 Auto" manual, and I am pretty sure I am capable of fitting it.

Just wondering if anyone had experience with the round, or even these cheap Sarco/Roto barrels which I believe are made by Armscor.

(I posted this before reading the other posts about .40 Super)

Have you looked at .40 Super? The difference is the .400 Corbon runs at about 21,000 psi, and the .40 Super runs at 37,000 psi. Both types of ammo are hard to find in factory loads. If you reload, you can download the .40 Super to .400 Corbon pressures.

https://en.wikipedia.org/wiki/.40_Super

Underwood sells both .400 Corbon and .40 Super

https://www.underwoodammo.com/400-cor-bon/

https://www.underwoodammo.com/40-super/

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