Thanks Don!!!!! Appreciate the information. But for the sake of discussion let's say we have in our collection maybe 2,000 examples of Pennsylvania built rifles that we can positively identify how many or what percentage of those rifles have swamped barrels? Another, let say we can positively identify 1,000 Virginia built rifles how many of those have swamped rifles barrels, North Carolina, Maryland and so forth and so on. Or, can we see a pattern?