I have a brand new savage model 10 that I am switching barrels on. I would hate to meet the gorilla that put it on. After a huge battle it started to move but i could feel a lot of grit in the threads as it moved. Once I got it off I found a significant amount of almost spherical grit on the threads of the barrel, on the receiver threads and the barrel nut. It pretty much looked like H335 powder but i am pretty sure its metal shavings. I am not sure if anyone has seen this before. I cleaned everything up, the threads look fine and the barrel nut now spins nice and smooth on the old barrel and it spins smoothly into the receiver (new barrel not here yet). Is this something I should worry about?