I just made up a little more than hundred 375 Whelen AI Brass. Most were from 35 Whelen, piece of cake.
I also opened up 30-06 brass just for the heck of it since I had some miscellaneous brass laying around that I wasn’t going to use in an ‘06.
1. First open to 8mm
2. Second opened to .338
3. Third opened to .358
4. Fourth opened to 375.
Then fire formed with cast bullets.
No losses...

I prefer classic.
Semper Fi
I used to run with the hare. Now I'm envious of the tortoise and I do my own stunts but rarely intentionally