I have an idea for a wild cat cartridge that I would like to try. I can have a chamber reamer made for dimensions of my idea. I would use any of the large SA magnum cases based off the .404 Jeffries casing and neck the case up or just use the .404 Jeffries case and neck down.
I have 2 questions that come up.
1. most rifle casings have a 35 degree shoulder. By just changing the caliber size the length from base to the beginning of the shoulder can change or the shoulder anhle can change. Which is more important to stay the same while the other dimension changes?
2. When choosing the case to use, is it easier to neck down or neck up a cartridge?
P.S. I dont like telling people my ideas as I will hear the, 'Dude! You cant do that!' So I just do it. If it works it works and if it don't then I can always sell the bad idea for scrap.