Many years ago I had a buddy who went home after work and had a cool one then started reloading 357 Magnum ammo.
He had just dropped a full load of Unique in a block full of cases when his wife called him to dinner.
He had another beer or two with dinner then took one along when he returned to the reloading bench.
He dropped a full load of unique in each case then seated the bullets.
He gave a handfull of his fresh ammo to a young fella that had just purchased himself a brand new S&W 686.
The first round he fired turned that new 686 into something resembling that photo.
They were lucky someone didn't lose and eye or a finger.
In the meantime, my buddy fired several of the same rounds in his personal 686 and it did not blow up!
However, a 38 S&W cartridge would fit in his chambers!
They would not fit in any of my 357's!
It seems, one revolver blew up and the other did not. But the second revolver's cylinder appeared to swell.
Soooo, you never know.
S&W said they felt both guns had been "abused".
I tried to convince my buddy to convert to 2400 powder rather than Unique. A case full of 2400 in 357 or 44 is a full load, not a double charge.