I have been looking for a model 13 or 65 on the on-line auctions. What puzzles me is there are quite a few model 13 and 65's in 38 cal. They all seem to be various government contracts. Why would the government contract to have a 357 chambered in 38 when model 10 & 64 were available? If you wanted a 13 or 65 why not do what most police departments did and just issue 38 ammo?