needs to be deleted.

Just for reference if not deleted (I assume you saw the short-barrel thread which refers to the LC9)...

I carry Speer Gold Dot 124gn +P without any failures (have fired about 20).

Here is a link to some different ammo tested in the gun:

http://www.goldenloki.com/ammo/gel/9mm/gel9.htm

They were tested in the P-11 which is the double stack version, but same barrel.

I put 60 rounds of Winchester PDX1 124 gr. +p through mine with good accuracty and no malfunctions. Recoil is snappy but that is to be expected.