A quick google found this https://www.longrangehunting.com/threads/bergara-barrel-thread-pitch.236966/
It's not quite what you asked but there's probably a lot more answers, I just didn't look too...
Type: Posts; User: zimmer
A quick google found this https://www.longrangehunting.com/threads/bergara-barrel-thread-pitch.236966/
It's not quite what you asked but there's probably a lot more answers, I just didn't look too...