Squib round shoots through magazine of competitive shooter's rifle - GIF and video

[Okapi]

For me, it's a "cow boy reloader" accident, in the bad sense of cow-boy, shooting at a time more than 15'000 rounds a year, I've never seen such a problem, but in "Sunday2 shooting at 25 meters i see a 357 exploding near me with a load without powder and after a normal one, the guy buy all reloading material and thinks it was easy as buying a beer, I think it sells all his material after that, it was a Taurus 357, very solid gun at all…
With military ammo, I had with very old 7,5X55 one round which not fire but never seen a multiple load with other ammunitions.