Val Geist survived a pack attack. He said he wasn't sure even full auto would be adequate against a big pack, as they make their attack from behind going for Achilles tendons (which I have seen in coyotes).
I only have one incident which was documented, where it was pretty certain it was a big pack attacking a lone man. It occurred in Alaska and the man did not have a working firearm. He had a knife, but it wasn’t enough.
Here is the article:
https://www.ammoland.com/2022/05/man-killed-by-wolves-in-1939-undocumented-documented-case/
I have read Valerious Geist on wolf attacks. I understand his reasoning, but it does not seem to occur the way he thinks it would.
One of the items Valerious mentions is the timidity of wolves when attacking new prey. They do not want to be hurt, so they have clumsy initial attacks, especially on humans. This makes them vulnerable to a defense with weapons, especially with firearms.