Casting for .256 Winchester

[Alstep]

I've got a .256 Win barrel for my Contender that I'd like to cast for. Sure would appreciate any recommendations as to what molds and loads work well for you. Thanks for your thoughts.

[Calamity Jake]

Lyman 257420, a 70 gr gc fp, I'm using AA1680 @ 15gr in a 1920's
Marlin 92.
There's load data out there. 2400, 4227, 4759 @ 9 to 12 gr's works.
Any of pistol/shotgun powders are good.