Why we don't use Steel-cased rounds in our Garands children.

[Dave Waits]

Joe, if the gun isn't firmly planted against your shoulder and the trigger pulled all the way back you will sometimes get bouncefire. You pull the trigger, the rifle recoils back against your shoulder because you held it loose and bounces back forward into your trigger-finger, firing a second round. This happens so fast it sounds like FA fire. This is what the guy in your referenced thread calls wrongly slamfire.