Figured I'd share since I didn't see it mentioned when searching how to fix my P3 when it was starting to do that thing where instead of going off the trigger would pull all the way back and......nothing until I gave the trigger a few good wiggles. But usually only the first shot of every session. The rest of the time it functioned as it should. I tried a few things I'd read about fixing the problem but there would always be one hangup until I put a drop of hydraulic fluid on the valve stem and on the breather hole a few times to get sucked in ahead of the piston. This will be day 4 of shooting a few groups throughout the day and not one hangup yet, just shot another quick group after I was up and about this morning and still working smooth.
I put a drop on that brass nut where the valve stem goes in and holding it upside down put the grip back on, then cocked the pistol and shot it a few times. It's tricky to get the drop of oil on the breather hole since you have to do it mid stroke (that's what she said) but it helps if you have a bottle with a needle dropper