Ive got a classy old rifle with a Griffin and Howe mount. I have both a Lyman Alaskan and a Leupold plainsman 2.5x that could go on it. Any significant differences to weigh on those two scopes ? Also the Lyman has a pointed post with a horizontal cross hair. Is the convention to use the point of the post or the cross of the hairs as they are not one and the same.