Yes, that is exactly what the brass did. I was unable to reuse the damaged brass.
So that was the reason for buying the KKM barrel.
I believe Redding has come up with a push through die to try to bring the brass back into
the proper case size, but I have been a handloader for over 50 years, and I will NOT use
damaged brass, or picked up off the range brass. If I don't know the history of the brass,
and unless it was fired in my weapons, it stays on the ground. What I do is mark the case heads
of my reloads with a colored marker. Then when I pick it up, I know its mine.
For the .40, I am up over 10 reloads. I use 6.5 grains of Herco, and 165 grain jacked bullets.
This load chronos at 1046 fps. This is an old documented load created by Ken Waters when the .40 SW
first came out. It works great, my Model 35 pistol functions great, and if I put a cardboard box at my feet, the fired brass lands in the box. So just a little scattered brass.