Re: strength of investment castings: the high stresses of firing referred to do not matter, as the cylinder and barrel, which carry these stresses, are made from bar stock, not castings.
About a year after the "cowboy" came out the head of sales @ Colt called me [I won't use his name,he's no longer there] & wanted me to do an action job on a Colt for him,when he got it back he said he didn't know that a colt action could be done this nice w/genuine Colt parts & not use piano wire springs,then he asked me what I thought of the "cowboy"-I told him I didn't like it & wouldn't own one & that I'd re-named it "the coca cola colt",he asked why & I asked him if he rememberd when coke changed the recipe & it turned out to be a disaster & he said yes,I told him that that's what Colt has done by bringing out the cowboy & that it was the same kind of a mistake.