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Slam fires are not uncommon with Garands. Military rifles have free floating firing pins that move inside the bolt. When the bolt stops it's forward movement, the firing pin lags behind just slightly and continues forward striking the firing pin when the bolt comes to a stop. Slam fires are most common when single loading. The action of the bolt stripping a round out of the clip is enough to slow things down and keep the firing pin moving with the bolt. Don't dismiss a high primer in the ammo, but this isn't too often seen in MILSURP ammo.
A series of events is usually the cause, not just one mechanical fault or glitch. Most slam fires occur when the round is seated nearly all of the way into the chamber and the bolt has nothing to slow it down as it moves forward over the bullet guide. Easiest way to avoid a slam fire is to make sure the round is only about a third of the way into the chamber and to hold onto the oprod and let it go after the bolt face is about half way over the bullet guide. There is no guarantee that you will never get another, but these are the easiest things to do to reduce the possibility of them occurring in the future regardless of the source of the ammo.
Good luck in the future
A series of events is usually the cause, not just one mechanical fault or glitch. Most slam fires occur when the round is seated nearly all of the way into the chamber and the bolt has nothing to slow it down as it moves forward over the bullet guide. Easiest way to avoid a slam fire is to make sure the round is only about a third of the way into the chamber and to hold onto the oprod and let it go after the bolt face is about half way over the bullet guide. There is no guarantee that you will never get another, but these are the easiest things to do to reduce the possibility of them occurring in the future regardless of the source of the ammo.
Good luck in the future
