... lucky no catastrophic results.
The result of a split case is always unremarkable, and certainly not catastrophic. No luck involved.![]()
Maybe, maybe not. Brass work hardens & splits like that, it happens. I agree, 7x seems too short, even for 40, but run max loads in a glock, it will happen sooner than later. How you clean your brass matters. Ammonia is bad, so is prolong citric acid cleaning.When they split in the middle like that that's an oversize chamber working the brass too much. on.
Without ANY information might as well say its due to Global Warming Or Polar Vortex.
I'll add to the question by asking how you are cleaning your cases. If you are using an Ultrasonic with a White Vinegar based solution that is the reason for your short case life. These cleaning solutions are mildly acidic and WILL leach the zinc out of the brass. When that happens you get VERY BRITTLE brass that doesn't last long at all.
"I find it incredibly hard to believe that a mild acid like acetic would be capable of de-amalgamating a bimetallic case that is amalgamated on the molecular level."
My high school diploma just self-ignited after reading that.