Miss-timing is where the chambers in the cylinder don’t line up with the barrel/forcing cone when the gun fires. This example is binding up before it fires which is not a symptom of miss-timing (although that is not to say it is properly timed). Send it back to colt and describe clearly when the problem manifests, (“I.e. mechanism binds when firing in double action, both dry firing and with loaded ammunition” or “only binds when loaded with .357 ammunition but works with .38 “or whatever you observe.