RH Factor, there are two links I would point you to. One on TFL, the other in dejanews. Unfortunately, I don't know how to paste the link directly in this response, so you will have to search manually.
1. Perform a search in this forum with the title: "Colt Python Info", posted July 9th. This post concentrates on timing issues.
2. Go to dejanews.com, under the forum rec.guns. Perform a search with this title: "Re: Evaluating used revolvers". It's an old thread back in 95. About 21 points to look for. Very good info.
Hope this helps
justinr1