I have a Thompson Center Black Diamond that "wanders" as the barrel heats up from shooting the gun. The inline rifle with clean shot powder is quick to rreload so the barrel can get pretty warm when sighting the gun in. When sighting in I clean the barrel between each shot so each shot is fired under as close to the same conditions as I can provide. It does not matter if I am using a scope or iron sights nor patched round ball or TC Sabots. Using the 209 ignition system with it and it never fails to fire, but after cool down at 50 yards you can be 6 to 8 inches off from where you sighted in at, which is ridiculous. I was wondering if anyone else had had similar problems with a T/C Black Diamond or know of anyone who has? Was T/C able to correct the problem?