Someone higher up at Colt was smoking the Demon Weed when they discontinued the cylinder detent and bolt system of lock-up ( of the C & B / 1873 ) for the New DA system...for 15 years!
WTF were they thinking is my point of view.
Here is where someone says their 1877, 1878 or 1889 locks up like a bank vault. To which I say " What bank do you use?" so I can use a different one. It's a matter of leverage...the further from the center of Axis the lock is, the more effective the hold is.
We use a pipe-wrench because the addition length gives us additional power to apply. But Colt moved the lockup from the 'detent on the outside' to the 'Axis'? It's like clasping your hand and fingers over the horn button to keep the car straight, as opposed to just using the actual ring of the steering wheel.
Totally backwards IMO...madness.
Granted they managed to get a potent round in a nice light medium frame wheelgun.