Originally Posted by GlockRenegade
Ok so I have heard rumors that continually chambering a round can cause bullet setback. Meaning the bullet has moved in the casing and could case damage when fired. I was told just compare the round to others I have not chambered and make sure the bullet has not moved. Typically when I un-chamber a round I put it at the end of the mag. Thoughts?
In this case the rumors are correct. Rotating to the bottom of the mag will help avoid this condition, then rotating carry mags will extend it further and rotating with the rest of your defense ammo supply will extend and help avoid it even further. Once the bullet moves back, it's best to discard it. Although I know of folks who just shoot them off, unless you have a gauge to determine a few thousands from a lot of thousands, it's best when detected by the human eye, just to discards them, or recycle them.
Although the usual cause, repeated chambering, you can get bullet setback by recoil, or just one chambering. This would be unusual and is mostly associated with reloads, but it's something to consider and observe.