Yes, there were some reports of "blow-ups" (bolt blew out rear of action), but only with the MkIII/M-10 action (the rifle pictured is a M1905 action). And only when the bolt was disassembled and then reassembled incorrectly. By the way, I doubt that the Ross rifle is the only rifle out there that if disassembled and then reassembled incorrectly, would be unsafe. The blow-outs were very rare and nearly all in military application. It is something that has been steadily associated with the Ross rifle over a great many decades. I think it we go back to the time when the company went out of business (around 1916) the reputation of this had not grown near to what it has become in later years.