Colt revolvers are a total different animal. Without going into a lot of detail, they are much more finely tuned than a S&W. Hence the theory that Colts were always know for their accuracy and Smiths for their ruggedness. Colts used parts that are harder and hold their tolerances better, but at the cost of failure if one part loses that tight fit.
Colt's lock up the cylinder with the cylinder stop and the hand, hence the old saying they lock up as "tight as a bank vault". On a Smith the hand has no part in locking up the cylinder. On a Smith the cylinder stop comes up much sooner and drags on the cylinder wall. On a Colt, the stop comes up at almost the last second as the hand takes a firm hold of the ratchet on the cylinder, imagine holding the cylinder pinching it between your forefinger and thumb.
David Reiss - NRA Life Member & PSC Range Member Retired Police Firearms Instructor/Armorer
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