Could it have caused a squib? Possible. What happened there is the pressure blew backwards around the primer since there was a gap. Soooo, the weak spot when the "explosion" went off was around the primer instead of the pressure pushing the bullet.Wow! Can’t believe I got one like that from the factory, not exactly cheap ammo either. I don’t know enough about the internal combustion of ammunition but I’m glad it didn’t partially push it out there or squib. Would that have even been possible?