Originally Posted by
ThermionicScott
Using a magnet to extract/manipulate the BBs, you run the risk of magnetizing them, causing them to attract ferrous wear particles in the vicinity. New BBs are so cheap, it's a no-brainer.
I don't know if magnetizing the balls is a real problem or just theoretical. However, while I use a magnet to be sure all of the old balls have been removed I position the new ones with a large pair of tweezers.