....proof has changed in England. Each barrel gets fired with two proof loads, one that generates maximum proof in the chamber area, and another that generates it at a point about 9" from the breech....
Thanks Ted, there's the problem. Maybe a third proof load that generates maximum pressure 18" from the breech would help a little. So much for the ole graphs showing maximum pressure builds just pass the chamber.
It is interesting that the most common increases in proof failure that were noted in the beginning, had to do with barrel failures that are generally blamed on obstructions when these discussion come up.
