Greetings,
Made .358 win brass from .308 years ago for my sons .358 with no problems. Only use new brass for forming though, never fired brass. My son also got some .358 loads from Belmont with reformed military cases. The Whelen should be the same. Make absolutely sure not to set the shoulder back though. From memory I just ran the expander button through the neck and back out again, didn't resize the case.
Grandpamac.
Bookmarks