I have a stainless steel Combat Commander. It was never 100% reliable. After about 1000 rounds of hardball had been fired thru it, I took it to Terry Tussey.
I got a "reliability package" and a trigger/action job with a Videki trigger.
Now, the trigger breaks at a crisp 3.5 lbs.
Since Terry worked on it, the gun has never jammed on JHP or hardball.
I can highly recommend Terry Tussey.
-Mk.IV