A friend recently said that he would never use rifle bullets over 2 years old for moose hunting due to the risk if them being bad. What he was refering to the "knock down" power. He also got into a story of a guy that had fired several shots a moose and when he cleaned it that several bullets had barely punctured the skin. He said several shots were fired and "old / new" bullets mixed up. Is it possible that the "powder" looses its power?? Also "failure" to fire is this a concern with older bullets? Some of you guys have done a lot more hunting than I will ever do and I would like to here your thoughts on this question. Keep up the good posting.