SX3 burst barrel, anyone see this before?

[gravelyctry]

I had an 870 blow the choke tube and end of the barrel off a few years ago while duck hunting. IIRC, first shot of the day, I pulled up on a drake and pulled the trigger. To my surprise it didn't drop, and when I lined up again for a second shot, there was something sticking up off of my barrel. It was the vent rib.
At first I thought I must have got mud in the barrel, but I was in my boat. That made no sense. It was a pretty new 870, so I called Remington and sent them the barrel. A month or so later,I got a new barrel, and an explanation that the choke tube threads had been machined off center.
I thought Remington CS did fine for me.

 

[TwoEyedJack]

Update. Winchester ammo contacted Winchester firearms and had them send us a new barrel. I asked for the technical failure analysis report, but it turns out that they never really looked at it. Anyway, hats off to Winchester ammo support.

 

[OilyPablo]

That turns out to be OK for you. Not a bad thing.

 

[gamestalker]

I've seen the same thing happen more than once. Most were caused by a barrel obstructions, mud. But one was at the T&S range, blooper.

GS

 

[Hookeye]

2nd pic looks like wad under the rib.