[quote=Jpyle;837851]moisture and humidity would be the major cause of damage to a round. There is no magic time frame but 6 months would seem to make sense as long as there is no visible corrosion, etc. One thing to keep in mind however is the effect of chambering the same round over and over...it will eventually seat the bullet further down in the casing, leading potentially to a FTF or a KABOOM. Not a good thing in a carry gun. Rotate the top round in the mag and be sure to verify the COL against a new in box round.
Catastrophic Failure of Semiautomatic Handguns
The following bulletin
was received from the New Jersey State Police -
Officer Safety Division
Date: February 23, 2007
Continuous reloading an chambering of
the same round may cause
catastrophic failure in semiautomatic handguns.
Agree with what you have said. Moisture/humidity is the worst enemy. Setback of the bullet in a cartridge after repeated chamberings is a real possiblity. Refer to the thread Chambering same round... and also a recent article on the subject.
Multiple chamberings does not always lead to a problem. Some cartridges are designed to resist setback. But rotating your stock to minimize number of chamberings is probably wisdom.