So a question for the gun press members, and especially any gunsmiths, metalsmiths or metallurgists. Or just anyone with knowledge or experience.

What are the relative merits of these three types of barrel steels? What's the difference between chrome moly and chrome vanadium? Why would you choose one over another? How do either of them stack up against stainless for accuracy (which is very subjective no doubt), durability, ease with which to work on etc?