When an autoloading firearm fails, it's almost always due to the magazine. It just isn't smart to cut corners on the magazine. I use only MecGar in my CZ pistols. If a better one comes out, I'll get that instead. I'm such a magazine fanatic that when a magazine fails due to anything other a replaceable part, I destroy it. Some people will keep it for range use but I'm not willing to risk the chance that I'll accidently pick it up at the wrong time.