I recently purchased a used Blackhawk in caliber .30 Carbine. The serial number is from year 1981 of manufacture. The revolver is in very good condition but I noticed that sometimes after firing the ejector rod does not line up with the chambers, preventing the ejection of empty cartridge casings using the ejector rod. When that happens, I have to remove the cylinder from the gun and use a cleaning rod to push the empty cases out of each chamber, then re-insert the cylinder into the frame. This seems to happen only upon firing the first six rounds from a clean gun (I always remove the cylinder when I clean the gun). Afterwards when I re-insert the cylinder into the gun, the ejector rod lines up OK and I don't have any more problems ejecting empty cases. The cylinder seems to be properly timed as I inspected the empty cylinder chambers down the bore with a light as I cocked the gun for each chamber. Each chamber seemed to line up OK. The cylinder otherwise seems to lock up tight enough (very little end-to-end play and no sideways play). Any comments? Thank you.