In case anyone is still interested:
This is a typical failure for the barrel, though, to be honest, I'm not sure of the mode of failure. From the looks of the break, it looks like the fracture started on the chamber end of the lug, and ultimate failure was at the muzzle end. Meaning the failure was during the rearward motion of the slide, not the forward motion. I have to admit, this is not what I expected.
SEM images to follow next week.
How many rounds thru this barrel, Bill?
I saw your first posts on your new P35. Very surprised it happened so soon.
Not my barrel.
I'm told around 3k total. This was a Inglis gun, 2 piece barrel FWIW.
Notice the striations run along the barrel axis? That has me confused. I was expecting them to run perpendicular.
Early 1940's metallurgy, then?
Could be.Originally Posted by FredM
This statement breaks the #1 rule of failure analysis, which is diagnosing before all the info is at hand: it just doesn't look right. It didnt fail in the anticipated way.
Any unusual wear indications on the sides?
I only have the barrel in this case. With the MkIII - no, no unusual wear. With the "MkIs" - also no, nothing out of the norm.
Again, the problem I have is the striations are running in the wrong direction for a fatigue failure.
If this gun is in fact from the 1940s, how much of the 3K rds was modern high performance loads?
Indeed. That was what had me wondering if the lug was getting twisted or flexed as the gun cycled. I am looking forward to your analysis.
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