I was present for a human error explosion. A guy had some guests to the club, they were shooting 7mag and .308, both types of ammo in 1 100 round ammo box. Guest put a 308 into a Sako stainless 7 mag. Bullet must have stuck in the throat forcing the rear of the round against the bolt face. Bullet left the muzzle end of the bore .024" smaller, clip blew out the bottom took a large piece out of the shooting bench. Shooter was uninjured accept for some powder splatter on his face, and rightfully scared sh#tless. Sako took the overpressure and vented down through the mag well away from the shooter. Very Lucky man.
Andy