Update:
Took the Twisted Industries 22 conversion installed on my LC380 to William's Gunsmithing here in Spaulding Township. They changed the hammer spring, shortened the firing pin spring, and modified the firing pin stop. End result was the gun worked great with bulk 40 gr Federal AutoMatch ammo with only an occasional FTF in 50 rounds but would NOT fire anything else with any reliability. Performance with Federal 36gr and Winchester 36gr was dismal. Even CCI 40gr and 36gr had 4 or 5 misfires every magazine.

Kudos to Williams for only charging $45 for all that work.

Then, because the hammer spring had been changed, I had to put the LC back to a 380 to check reliability as a 380 and it ran 20 rounds with no problem with decent firing pin strike depth.

Then I changed it over to a 9mm and had the same result... 20 rounds with no problems and decent firing pin strike depth.

I kinda like having one gun with 3 caliber choices.