New lockwork?
ColtPythonElite, let me guess your favorite series of revolvers...
However, your statement is wrong historically. All the Colt revolvers based on the Police Positive or Official Police or New Service have the lock work that wears and loses timing very quickly. (Not to mention the double action trigger pull is execrable.)
If there is a new line of Colt DA revolvers with 'new' lock work, that is good news. I am familiar with the 'old' ones. I confess guilt in not following new guns much, especially not Colt revolvers as they never suited my style of shooting - double action - or worked as I thought they should. When did these new revolvers come out?
You bought a Mk II recently and paid less than $500. Good for you. That is less than a pinned barrel model 19 would cost. Frankly, I'm not too well disposed toward the new S&W revolvers, either. They are now cheap copies of S&W revolvers.
mmitch, the Colt revolvers have always been 'stout' in terms of frames and barrels. They seldom suffer a catastrophic failure. It's the internal workings that wear out. Not so much a part breaks and the gun locks up, but when one part wears, the other parts change in relative position. Unless this is one of the 'new' revolvers CPE mentions.