That looks pretty bad. Definitely a brown shorts moment.
bullet exploding in chamber!!!!!
Slamfires on an SKS usually are caused by the pin not fully retracting causing the round to go off as soon as it loaded. This causes the gun to empty the clip in quick succession.
Slamfire - Wikipedia, the free encyclopedia
Never had it happen on my SKS but it would definitely be an eyeopener at the range.
