The Mod 16-4 will handle the 32 H&R Magnum, the 32 S&W Long, the 32 S&W, and I have been told (in emergencies only) the 32 auto.
If you need help sighting it in, I would work from a Sand Bag rest, off a solid bench, and start at 25 yards. If you are familiar with normal sight picture, the front blade top level with the top of the rear sight and the blade centered in the notch. Fire 3 rounds and see where the "group" is then adjust the rear sight in the direction you want the group to move to. It is a little trial and error until you will be satisfied with group on target.