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Joined: Feb 2011
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Sidelock
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Looks very similar to the last photos of a damascus blow-out that i saw.
That looks quite spectacular. And not in a good way. It is good to hear that the shooter was not harmed.


B.Dudley
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Sidelock
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A lot of speculation. Anyone remember the overloads (30K psi +) that Sherman Bell fed a Damascus Parker before it blew? Unless there was a serious issue with the structural integrity of that gun before the accident, I have trouble believing that it could be attributed to only the load.

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Thank you Toby and 16SXS to confirm this. Again from 3 rd. hand report a 12 ga. and a compresson form commercial load. the whole side of chamber blew out from the breach to frontof hinge pin. Several known people there and the shooter tho not hurt badly was stunned for a period. No posts so far on the parker site? We never here much of damascus failurse and it always seem blamed ion barrel obstructions before experts evaluete.

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Sidelock
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I have heard multiple reports of obstruction blow ups being related to the new Winchester AA hulls. The thought has been the baseplate detached from the hull and lodged in the bore. Next shell goes off and the blow up occurs. For that slight risk I have not loaded any of the current AAs. That and the fact I have two fifty five gallon drums of the old ones. Just wish they were 16 ga compression formed hulls.

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The AA base wad issue was real. It's been fixed in current production shells. We learned that loaders that do not use a primer seating ram from the inside of the shell such as MEC does could move the base wad while seating the primer. A very bad thing. I've loaded many thousands of two piece AA hulls including the initial run on MEC equipment with no issues. This possibility of a moving base wad exists with any shell that incorporates one. It's one reason I refuse to use hydraulic powered loaders. I want that feedback from the press to my human 'force monitor'.

The general rule is that a chamber blowout is caused by excessive load, and that a burst barrel further up is caused by obstruction. The obstruction leaves a 'ring' of some sort.


"The price of good shotgunnery is constant practice" - Fred Kimble
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Sidelock
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Small images on a thread inadequately illustrate what is usually very apparent on direct inspection, but

Chamber blow out without a ring bulge. Note no rib lifting



Another chamber blow out without a ring bulge; very localized rib lifting



Chamber blow out WITH a ring bulge, and rib lifting



I only play a metallurgist on DoubleGun wink but:

SEM of the fracture edges in an obstructional burst show elastic deformation with ultimate cleavage.
Over-pressure burst show little elastic deformation with predominate cleavage.


"The general rule is that a chamber blowout is caused by excessive load, and that a burst barrel further up is caused by obstruction. The obstruction leaves a 'ring' of some sort."

That was Sir Gerald's position. Today however ANY burst, ANYWHERE is likely from "inexpert" chamber or barrel work frown

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Sidelock
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Images of the OPs referenced blow up will be posted shortly

The shells were factory Remington STS Sporting reported to be 1275 fps, but that fps not listed here. Possibly the 1 oz. Nitro at 1290 fps?
https://images.remington-catalog.com/5689a23e991d5

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THIS is the gun. Did the best I could to enhance the images.









I would of course defer to someone with barrel in hand, but do not definitely see a ring bulge. The top rib extension is gone but possibly just from the burst. The destruction of the FE and broken stock suggest MUCH more recoil than one would expect from a properly loaded factory round ie. almost something like this Citori



A formal Metallurgical Failure Analysis would be most interesting

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What is the section of threaded screw hole between the barrels under the missing top short rib? Did someone attempt to repair a loose rib with a screw instead of soldering? As I recall both barrels that blew up at 29,000 to 30,000 psi in Sherman Bell's Parker test gun ruptured where the barrels had thin spots from extractor or extractor retaining screw holes.


A true sign of mental illness is any gun owner who would vote for an Anti-Gunner like Joe Biden.

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Was he able to finish the round with the left barrel?

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