I cleaned and lubricated a new LCP II 22lr and tested it for ammunition.
It ran best on CCI Standard Velocity 40 grain with no failures other than one light primer strike.
Aguila HP Supermaximum: light primer strike and multiple FTFs.
Aguila Interceptor: light primer strikes.
CCI Mini Mag: light primer strikes and FTEs.
CCI Copper 22: multiple FTFs.
Federal Punch: multiple FTFs and FTEs.
Federal Game Punch: light primer strikes.
Fioccchi Field Dynamics: one light primer strikes; one FTF and one FTE
Remington Target: light primer strikes.
Stinger Hyper Velocity: multiple FTFs.
I will send it to Galloway Precision to install their spring kit.
Update
Results after installing the Galloway spring kit and polishing the feed ramp:
Aguila Super Extra:
50 rounds, no failures
Aguila Super maximum HP:
30 rounds, no failures
Mini-Mag:
90 rounds, two light-primer strikes
Golden Bullet:
100 rounds, eight FTEs and two light-primer strikes
Federal Game Shok:
50 rounds, five FTEs, three light-primer strikes
Second Update
Aguila Super Extra:
90 rounds, one FTE
CCI Standard Velocity
100 rounds, two FTEs