Just wondering if it's common for a new barrel to have a bird's nest of metal in the bottom. Have my first build put together and the last step was the ramrod. Finished my ram rod, and for rips-n-giggles put it down the barrel and knew there was something down there. Went down with another rod and screw and pulled out a bunch of metal filings. I'm assuming from when the rifling was cut. Just wondering if this is normal.