Originally Posted by MadMooner
The 400 looks like a fun cartridge.

Is the cylindrical brass the way to go? I know Mainer on here has had luck with his similar chamber simply necking up 9.3x62 brass. It is a bit smaller in the shoulder and not full 2.5 length but obviously very available.


Yep, i found the cylindrical brass price to be rediculous. A simple neck up of cheap 9.3 prvi brass to take .410 swift a-frames rather than the .411 of the whelen. The shoulder was plenty to head space off of. I didnt even fireform.......just hunted with them.

Every rifle loony should run 41 cal bullets on a standard case. Not at targets and forums, but really BIG fkn animals.

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