Interesting. I'd say 75% of the 12,151 rounds through my USP 45 is Blazer Aluminum and they (the gun and the ammo) have always been perfect.
Ah well, shrimp happens... best of luck!
There's honestly no way to know if it was the actual aluminum that caused it. The gun has 6250 rounds through it and 2k was aluminum. However I haven't fired aluminum in about 2 years or about 2k rounds. The aluminum may have weakened it but I'm 99% I would've found the damage much sooner than two years ago. I am meticulous when I clean my guns.
Ammunition is NOT what it used to be. Regardless of brass or steel or aluminum. Look at WWB. Used to be the goto stuff. Now it was STAY AWAY stuff
I'm just glad it's getting fixed
Nos pro patria
Nothing HK could have done to keep this from happening, but it does happen a bunch in the industrial process of playing with steel.
I work in vibration and have seen 5k bearing sets that have a bad ball or race from the word jump on the startup of a machine.