The gun has performed flawlessly for 400-500 rds.
You switched ammo and it malfunctions.
Try switching back to the ammo that ran. If that
cures the problem, don't buy any mor Fiocchi ammo.
The 22/45 takes a little getting used to. There are
a few things you can do to make it more operator
friendly. My wife's 22/45 has:
Volquartzen trigger kit
Hammer bushing replaced to remove magazine safety
Cocking handle so she can rack the slide easily
Replacement (longer) magazine basepads to make
it easier to seat the magazines--hers are purple.