Willy,
Unless there is interference with the hammer hitting the backstrap before full cock engagement (check with hand removed), the cycle length is from at rest to full cock. In that travel, everything happens when it's supposed to. The first action parts put in a Colt type S.A. are the hammer and the trigger. That defines the length of cycle.
When the safety notch is reached, the firing pin should be completely out of the cylinder window, bolt still in locking notch.
Further movement of the hammer should have bolt retracting immediately.
As soon as the bolt head clears the cylinder, the hand should start cylinder carry up.
As half cock is reached, cylinder is free to spin/remove/ install.
As cycle continues from half cock, bolt should "drop" (onto cylinder) in the approach one bolt width before the locking notch.
When full cock is reached, the bolt should engage the locking notch at the same instant sounding as one click. (Checked with a finger dragging on the cyl.)
If the cylinder locks up before full cock, second finger is too long. If full cock is reached before cyl lockup, hand needs to be stretched or replaced.
Make sure the bolt arm (left one) falls off the front of the cam, not sliding off the side of the cam. This can be seen from the bottom (sans trigger guard) or the top, watching down the hammer slot.
Mike
www.goonsgunworks.comFollow me on Instagram @ goonsgunworks