I know Todd did not like the PX4. I even asked him to give me specifics about the issues he had seen. Todd never gave me much info and I don't why he did not seem to want to talk about it, and I never will. I miss him often
I have about 150,000 rounds through 6 different PX4s and have yet to have to use a mallet to get one to function. I am not saying it will not happen, as I have had to beat several other guns apart, either when they break or from a bad round. I have had to help many students get bad rounds out of their chambers that they could not clear themselves. So far, never with a PX4.
To be honest, I am not sure why a rotating barrel would be harder to clear a bad round from than a tilting barrel system. It does not make sense to me that it would.
I have personally had a Glock blow up in my hands. Well, maybe blow up is an extream definition. The barrel split in on both sides of the bottom of the chamber and blew the magazine out of the gun and the slide came off of the frame. Also, the extractor went missing altogether. I still have all my fingers and no permanent damage, that I know of, so it really did not blow up.
I am not even close to the only guy this has happened to and I have seen it happen to others on the range. And yet the Glock is still the preferred handgun of the world.
PX4 might need a mallet if you shoot shitty ammo through it...... I will take my chances.