Say if you don't have a reloading die for a caliber ...

[BigUglyMan]

Sharper shoulder might work better.

 

[tjhaile]

What sort of a gun is this going to be for?

Why not have a custom die set made? You may also need forming dies to form cases in more than one step, depending on how much the brass is worked.

 

[Dimitri]

Robert Interesting Idea, I finally put mine on a CAD program to see it and this is what I got:

Dimitri

 

[B]

If you are going to trim the brass why not do it all? That WSM one sounds neat, who make .401 bullets that'll hold at 2700fps?

 

[Dimitri]

If you are going to trim the brass why not do it all?

Because I wanted something simple one could do at home, heck at the amount I've cut off, you could use 30-06 Brass and probably 8mm Mauser Brass to make this round.

Dimitri

 

[Andy]

It would have a tiny bit more capacity than the 414 Super Mag. Starline sells that brass, but hardly anyone buys it. Meh.

 

[commonman]

Dimitri, Just wondering if there is enough shoulder to head space the case?

Wasn't there a member advertising a single shot on EE that used a 30-40 Krag case straightened out for a 40 cal bullet? Seems it was not so long ago.

 

[Dimitri]

Reliably no, actually you'd end up using the over all case length as your guide when head spacing. Like some do with straight walled cases.

Dimitri

 

[roberti11]

I modelled the case first as you described, but the shoulder is very shallow and I do not think it would work well for a high pressure round..
This one will generate 50,000psi, and drive a .40 cal, 200gn bullet at 2500fps. I think the cartridge will be more accurate with more of a shoulder.

Here is the .40 NC Carbine