Purchased a Para-Ordnance P16.40 LTD a few years ago and have put at least 1500 rounds thru it without the slightest failure of any kind.
The only ammo I use is Remington's 155 gr. JHP (R40SW1) that has a muzzle velocity of 1205 FPS and FPE of 499. This is not their Golden Saber round, just their standard JHP.
Using Para's extension base pad and 1 in the chamber, the P.16 holds 19 rounds of .40 S&W.
Safe shooting.