I had the misfortune last summer to see first hand what lead bullets in a 40SW Glock can do. I was at the Garland Public Shooting Range one day. A fairly regular shooter came in to shoot. After a short time his Glock blew up (the kaboom effect). It blew the barrel about 7 yards out in front of the shooting stations. The polymer frame exploded as well as the magazine. This inflicted injury to the guy's right hand and to the right side of his face. 911 was called and the guy was taken to the hospital. The range safety officers later told me that the shooter had previously bragged about loading hot lead loads for his Glock 23. The manufactures warn people for a reason. I have been told that aftermarket Glock barrels have the feed ramp modified to offer full support for the shell case on a 40. Due to the high pressures of most 40 loads, I would not recommend relaoding a 40 case more than 2 or 3 times at the very most. I just buy mine at the store, I am sure the hospital charges will far outweigh and benefits of relaoding the 40 for me..
I think your confusing idiot reloader with a problem with an actual problem with the gun or cartridge.
I can make any gun explode by filling the case full of bullseye and not seating it properly.