My good friend just got back from his concealed carry class. The instructor was the same one I had two years ago. I am very disturbed to learn what this instructor was teaching. First, my friend borrowed my cz 75 as he has only a ruger gp 100 .357, a gun I helped him pick out as he is new to pistols. For training for this class he borrowed an old browning 9 from his father and was getting used to semi autos. I insisted he try my cz as he couldn't understand how my groups were so good. He shot the first 10 rouds from 10 yards and a new world of accuracy was opened up for him. He loved the cz. Said his next gun is going to be a cz 75. I had tried to tell him that it made me look like a champ and the cz was more accurate than I was. Imagine my dismay when the instructor bagged all of the students firearms, my cz in particular as he said they were junk and fell apart after a few hundred rounds. specifically, the barrel would devolope a crack or weak spot near the muzzle. I've fired 2500-3000 rds from it and have only had one jam which I think was ammo. The next bomb this guy dropped was that a .357 mag revolver such as my biddies gp 100 or my service and security six .357 mags were " useless" for self defense as the bullet is too slow to cause damage. Specifically, actually saying that a 9mm is a better round because it is faster than a .357 mag ( which is isn't ) and that a nine with the right ammo will penetrate a human sckull where as a .357 mag will not. Am I on my own here in believing that this guy is full of crap? Sorry to be long winded, my first time posting. any thoughts would be welcome.