just brought home this BH serial 30-38xxx Was actually just picking up another gun and saw this thing with 3 screws and might have got a little too quick on the trigger. No box or papers just marked 1970 Blackhawk .357 $550 so I grabbed it. Got home cleaned it up everything seemed solid until looked and saw those little rings inside cylinders and sure enough is 9mm. Does anyone know maybe if this was originally convertible and best place to find a replacement .357 cylinder ? Saw one on GB for $175. Is that fair price.