The PX4 Storm in 9mm is enjoying much celebrity currently. The .45 Storm has it’s own characteristics. In this thread, I would like to discuss the PX4 .40 full size. It is not as popular and deserves a closer look.
We’ve put many thousands of rounds on full size Storm .40s. Here are some observations:
Reliability? 100% reliability is our experience. Here are some reasons, in my opinion: Firstly, the cartridge is high pressure and will throw the slide back hard enough to eject well and setup reintroduction of the next round. Secondly, the harder hitting rounds require a stronger slide rebound spring which works well to strip off that top round and push it in.
Note- The .40 needs this. With a 9mm you can chamber moving the slide forward more slowly, a .40 needs to slingshot forward harder (as does the .45).
Thirdly, the recoil of the .40 is somewhat sharper than the 9mm. This causes the shooter to not slack off and have a loose grip. Though, we have done limp wrist tests and found them reliable still.
Wear & tear? We have found the .40s to not wear much on inside parts (compared to .45), slightly more than the 9mm.
Cleaning? We have found the .40 to get about 30% dirtier (per round) than a 9mm, ammo brands being equal.
I was not planning to make this thread about ballistics, but we could discuss that, if anyone is interested.
What has been your experience? What things would you like to discuss about the .40?