making 400 Corbon brass the easy way!

[USMC DOC]

How I do it....size the 45 case in my Lee carbide sizing die(requires no lube) do about 100-200 at a time. Then swap out my Lee standard steel 400 corbon die and form them...and no lube is need for that step either as you are just forming the neck not the case. Easy as 1..2..3 !

 

[ReloaderFred]

Welcome to the board!

That's the way I've been doing it for several years, only I don't use Lee dies.

Hope this helps.

Fred

 

[hoghunting]

Welcome to the forum.

I have friends that shoot the 400 Carbon, and size brass the same way also.

During an interview, Jeff Cooper said that if you neck the 400 Carbon up to a .45, then you'd have a fine cartridge.

 

[BigJakeJ1s]

This technique also works well on 357 sig, with 40SW/10mm carbide dies.

Andy

 

[LAL357]

i have read that you have to use 45 +p brass and that you can use regular brass .any thoughts/input on which one is needed?

 

[ReloaderFred]

For making .400 Cor-Bon brass, I like to use Winchester and Federal .45 brass, since they're the thickest of all the commercial brass. They last longer than the thinner offerings from Remington and Speer. There's no need for +P brass.

It works best to use new brass, as you'll get fewer damaged cases when you neck them down. You can use once fired brass, but work hardened brass doesn't do well when trying to make the conversion. Another thing to watch for is round case mouths. If the case mouth isn't round, it will wrinkle, and ruin the case.

Hope this helps.

Fred

 

[ReloaderFred]

BigJakeJ1s,

You can get by making 357 Sig brass from .40 S&W brass, but only for moderate loadings. The 357 Sig case was engineered from the ground up for the increased pressures of the 357 Sig loading. The case is also longer, and if you use .40 brass, the already short neck will be even shorter. If loading necked down .40 to maximum loads, you're walking a tightrope.

There is ample 357 Sig brass available at a reasonable price, so there's no need to make it from the weaker .40 S&W case.

Hope this helps.

Fred

 

[MrOldLude]

If memory serves, the ease of making the .400 from .45 ACP was by design.

 

[LAL357]

thanks for the replys guys sorted out my 45 brass last night never relly knew there were so many different makers of brass.