I will preface this by saying the Murphy lurks everywhere waiting to create trouble. But the short answer to your questions are no and no. Enjoy shooting and don't worry.
Well I want to know why you are asking? Something happen?zigzag said:headspace measurement changes (after so many rounds) ? Or theres a safety pin to keep it from backing off?
Yaaa-haaa-haaaa! That's what we Savage nuts thought about the Savage barrel nuts. Come to finddonut slayer said:The barrel nut on the marlins are installed at the factory by a 800# gorilla. So, no, they wont shoot loose.