I've also wondered about making .375win from 30-30. Just what is the process? I've heard everything from 10 grains of bullseye and a wadded tissue to 10% case volume and cornmeal. For pistol powders I have AA#5, W231, and WST. Will any of these work to fireform the cases? I was also wondering if ground walnut from my tumbler could (or should) be used over the charge. Thanks for any advice.
"An unarmed man may be attacked with greater confidence than an armed man."
Cesare Beccaria, the father of modern criminology