I like the .45 colt round and have owned a few revolvers in that caliber in the past. I already have dies, brass, and literally thousands of bullets in that caliber (estate buyout) I am looking for a good quality, american made, adjustable sight revolver in .45 colt, but the more research I do, the more confusing it gets. It seems like every gun I look into has the strong possabilty of problems. I have heard that some S&W's have the chambers or bore oversized,or the cylinder is too short. I have heard that some Rugers have the throats undersized? If I want a pre-lock S&W or a Ruger Blackhawk in .45colt and I want a very accurate gun, what model/age/serial number range should I look for to have the best chance? (I know all guns are different, I just want to stay away from potential issues)