I watched Dirty Harry and Magnum Force. At the end of Dirty Harry when Clint goods thru the whole '' I know what your thinking'' line,you get a really good look at his 29,and it as a pinned barrel. When Magnum Force starts Clint is holding his 29 for several minutes and all you see is the side of the gun. That 29 does not have a pinned barrel. I always thought he used the same 44 in all the Dirty Harry movies. Anyone have info or knowledge on the different guns used?