Good Eve guys/gals I have a question about cleaning. I have been taught over the years that when you switch bullets you should clean your gun ,and when I change to different bullets I always clean my gun, but I have been out with a few guys now that take their guns ,and shoot cheap factory bullets to foul their barrel then they shoot their hand loads , is this correct ?? or should I be sticking with my old practice of cleaning when changing bullets. The reason for asking is that I had a box of Rem factory ammo that I had bought when my gun was built incase I could not find brass in a timely fashion , but I was able to find brass so I never did shoot the factory stuff, and I recently purchased new scope ,and had no hand loads so I burnt up a box of factory , just wondering if I should clean before I shoot my hand loads .