Thanks to all, I have finaly looked in my Dutcher book, and he shows the same view and pronounced it as cast so it must be. I also pulled down my forged action to compare, and this one is a cast unit, it seems that they are different under the tang also, the forged tang underside is solid smooth steel, no reces to hold pond scum.
Mike

Well, I'm not so sure that is is the wrong end, I used to think so, but after looking in Dutchers book he clearly shows this as a cast action and shows just about the same view, so I'm guessing that there are 2 main features of a cast action, under the barrel lug and the under side of the upper tang. And in the other picture I have it almost looks as though the tang for connecting the thru bolt is cast into the action, as in one solid piece, whereas the forged action this section unscrews.
Mike