I have a Glock 22 that I bought in 1991 or 1992 new. I had just got done with boot camp for the marines and it was my first pistol that I ever purchased. Unfortunately deployments then life got in the way of spending time at the range with her. I recently just started shooting again. Today after the range I noticed a lot of brass inside the pistol when cleaning. I was using Winchester white box cheap ammo. Is this normal? My glock probably only has 300 rounds through it and has always been cleaned after each trip. I also have a colt defender and have not noticed the same brass dust after cleaning.