Look in the gunsmithing section of the Coltfever site for my instructions on how to check the timing of the older model Colt's....down the page.
http://www.coltfever.com/GUNSMITHING.html
The Officer's Models of the 1920's through the 60's will typically shoot almost as well or as well as a Python, especially if you hand load Mid-Range Target loads with 148 grain wadcutter bullets.
Find a load a specific Officer's Model "likes" and it can turn in astounding accuracy.
Back in the pre-WWII days the Colt's held all the records, and the top shooters almost always used Colt target revolvers.
These were Colt's top of the line premium revolves and quality was the best ever in the 20's up to WWII.
One key is that they need to be in proper working condition and timing.
Fortunately, most owners of the Colt Officer's Models didn't abuse or monkey with an expensive target revolver.
The .22 was made in 1939-1940. This would be an Officer's Model Target Third Issue made from 1927 to 1949.
The .38 was made in 1926-1927. This would be either a Second Issue Officer's Model, or a Third Issue Officer's Model Target depending on the exact year made.
These Officer's Models shared serial numbers with the Army Special.