Update: Been having a lot of issues with my P365 since the last post. Put another 700 rounds or so. I have this odd issue where the firearm will not return to battery. First time, I tap-racked, ejected a live round, then the gun still would not go all the way in to battery. Had to extract the magazine, then field strip to stop the problem from occurring. Some posts on Sigtalk suggest that the recoil spring is moving out of position.
Second time today about 243 rounds in to a reliability test, had another failure to return to battery. Tap-rack, still no joy. Attempting to push the slide forward didn't rectify the issue. Had to eject magazine and rack a few times to get the weapon back up.
I've had about 4 FTEs in the last week as well, albeit, with an aftermarket barrel. During torture dot drills, I'd get a failure to extract around 36 rounds in. Weapon would consistently fail to pull the round out of the chamber. Upon examining the case, I can't tell if it's an issue with the extractor tension. These malfunctions still happened after extensive scrubbing of the extractor claw. To be fair, I only had one FTE with the stock barrel.
Malfunctions occurred with WWB and Blazer Brass.
Suffice to say, my faith in this weapon is definitely shaken. Never had similar issues with my Shield, PM9, or G43. Going to send this weapon back to Sig on Monday to see if they can't diagnose and repair.