It's almost always a .40 S&W Glock.
I have read that the 10mm Glock is the worst about "KB malfunctions", the .40 is a close second. .45 sometimes, and the 9mm is usually trouble free in this area. The theory is that it has something to do with the pressure curve of the 10mm and .40.... or something like that....
The problem w/ the .40 is bullet setback.
Because it is an optimized cartridge, it has very little excess case capacity.
Even a 10 Thousands set-back will raise the chamber pressure dramatically.
I only shoot reputable factory .40.
GR
