There's a website with all the Colt Woodsman/Challenger info you could dream about. It is a classic and collectors abound. http://stevespages.com/pdf/colt_chal...aliber_.22.pdf
or just google Colt Challenger or Woodsman. There's alot of info out deah.
I just found one and am impressed with its accuracy and reliability. It's a beautiful pistol and the fourth Colt semi-auto in my inventory. There's much to like about this model, the Woodsman series, and the entire history of the Colt legend.