I have a .45 conv. Blackhawk & while cleaning it after a day of shooting I noticed that the blueing is starting too chip like paint sorta. It's on the bullet end, center of two chambers, in 3 places on the side. Could this be from shooting too heavy of a load? The heaviest I use is 300xtp w/22 H110 and only shot it about 1 cyl.full. I usually shoot mild to medium loads in it. In any of the loads I've had no extraction problems or blown primers