Burrard, Volume III, pg 415: "But in the case of an obstructional burst the really essential evidence is the ring bulge. If there is a ring bulge, there must have been an obstruction; and the absence of a ring bulge is conclusive proof that there could not have been an obstruction."

Burrard, Volume III, pg 415: "But if the burst occurred at the breech, and was the direct result of a high pressure, confirmatory evidence will be found in the appearance of the brass head of the cartridge which caused the accident. For it is utterly impossible for a very high pressure to be developed without it leaving its mark on the fired case"


I am glad to be here.