400 Corbon

[chuck perry]

I've worked it up in gordons reloading tool.
I'm sure the model is off at this point, with known data and results in some agreement.
behind a 155 grail XTP, @ 1.225" COL, we get an absolute COMPUTED maximum of 8.5 grains of CFE pistol.
A start load of 6.5 grains seems a prudent starting point. It'll get it out the barrel. definitely take your time climbing the ladder

Thanks for doing this!

Sent from my moto g stylus 5G using Tapatalk

 

[colt_saa]

I made a couple more dummy rounds today with bullets I have on hand, 160 and 180 lead flat points. I used minimal case mouth expansion and crimped with the Lee FCD. I tested case neck tension by pushing the cartridges, bullet down, on my benchtop. Those things are locked in tight, the FCD is a heck of a useful tool for stuff like this. I don't think I'll even fool with adding a cannelure. The only thing I might add is to inside chamfer the case mouths to ease seating and hopefully eliminate any shaving that might occur when seating the cast bullets.

Sent from my moto g stylus 5G using Tapatalk

The Lee Factory Crimp Die for bottleneck cartridges in parts Collet Crimp to the loaded round. It does not require a cannelure it will take care of that all by itself

I have been using this style FCD for decades on many different cartridges including straight wall pistol cartridges.

When I was having trouble with 357 SIG neck tension the Lee die solved the problem. I can even load the 50 grain Total Copper Projectiles in that tiny little neck and have zero set back issues. Of course that bullet moves out at 1800 feet per second from a handgun which is kind of cool

 

[Garrett-J]

At the end of the day, my .400 Corbon experience convinced me to buy a 10mm and call it a day. Bottleneck pistol cases all have a problem with bullets being pushed in, and the .400C was worst of all in a 1911. The blunt bullets butted into the frame ramp and were only to happy to deep seat and fail to chamber.

This was my experience as well. Actually it was worse than that. Chambering a round would often push the bullet back in the case, but would still chamber, allowing the cartridge to fire. I would get completely flattened primers with the firing pin indent completely ironed out.

This was all in the late '90s that I was playing with the cartridge. I ended up selling off the dies, barrel, and a sack full of brass.

The biggest issue I found with the cartridge was that the neck is so short, it has trouble adequately holding the bullet in place.

Looking at my notes, I had worked up loads using Win-540 and WSF powders.

For data, the cartridge is listed in the Accurate Arms No. 2 manual. This one was originally published in 2000, but used copies are still available. I think I bought mine on ebay, and I see a used one listed on Amazon.

 

[DWalt]

AA No. Two manual is available here and does have .400 CorBon data. It takes a little fiddling with an ad, but it is accessible. Accurate Reloading Guide | PDF | Cartridge (Firearms) | Pistol And Rifle Cartridges

 

[Law-dog]

400 corbon erroneous data

Chuck you are getting bad info here. Go back to the 1911 forum and we will load you up. You cannot safely use 10mm load data. The 400 is only close to the 10mm with 135 and 155 grain bullets.

I have been loading them since 2010. Buy your cases at Starline, get that case gauge from shooters box, get that Lee FCD, your Lee dies are fine. I will list powders over there.

400 Corbon | Page 2 | 1911Forum

The original loading data was a 135 grain bullet with 9.0 grains of Universal. Mine go 1,380-1,412 fps average over many years.

Buy a box of ammo from Underwood or Corbon and use them as to length. The 164 grain Corbon ammo goes 1,363 in my 5 inch 1911. The Underwood is just as good.

You will want a 20 or 22 pound spring and shock buffs are a good idea.

See you over there, Ranger 4, out.