After fair bit of testing in the Marlin, (not Mossberg as originally stated) I have worked up some nice loads.
At the range yesterday,I fired some 732 cast lead balls loaded in new winchest cases, plastic wad with the petals cut off and a 1/2 felt wad over load of AP 100 N and a roll crimp. The bestgroup I got over the benchwas 1 1/2" for three shots. They averaged 2 1/4 at 50 yards. I am trying to get access to a chronograph to see how quick thye are going.

With a 726 grain parodox projectile I have settled on AP100N with the above wadsfor groups of 2 1/2 inches at fifty yards. They are comfortable to shoot.

AP100N is I think not quite as slow as blue dot. As soon as Iget to a Chronograph I will post the velocities.

Thanks for you advice Daryl s.

Wayne