I've heard a lot of great things about the Ruger Old Army revolver and I'm interested in getting one. I'm more interested in accuracy and high quality than cowboy shooting or being a replica. Are there any negatives about the Rugers ??? I'm thinking stainless steel would be the best route to go as far as durability and ease of cleaning, but I'm torn between the 5 1/2" barrel and the 7 1/2" barrel. What are the pros and cons of each ? Any difference in accuracy or performance ???