Somebody say squib??? Where, where, where??? Huh, huh, huh???
Like others that have experienced the misfortune of said squib, normally the primer only has enough oomph to push the bullet into the barrel far enough to prevent full cycle. Thus not permitting another round to be chambered,
no matter how hard you slam the back of the slide with your non-firing hand.
One then has to clear said jammed weapon, disassemble it and dislodge said bullet from it's hiding place in the barrel and then reassemble weapon to further enjoy the days adventures.
That is unless it happens again and possibly a 3rd time, then the annoyed RO might just suggest that you return home with your box of screwed up ammo and rethink your abilities to load your own ammo. 
Are we clear on the subject now? I'm here all week. Try the veal.