Older 12 gauge DHE

[OH Osthaus]

I like the RST's

but I have used the Polywads to good effect- both the spread-r and vintager
http://www.polywad.com/spredr-shells.html

the DHE will also likely have short chambers - but any thing is possible

[Pa SxS]

Mr. Forester,

I'll try and answer your question about mechanical changes from 1903 to 1936. There aren't any major mechanical changes, just minor ones. You mentioned the addition of a wear plate, they changed the top lever linkage to the bolt making the top lever shorter and changed from a flat spring to a coil spring for the top lever. The safety button was changed to a different style and they changed the sculpting of the frame to cut down on labor. They never implemented the major redesign to reduce the number of parts. I don't think the ejector system was redesigned once it was put into production but I could be wrong. Others can chime in if I missed something. The Parker Story goes into great detail on the changes.

You should be able to use any off the shelf load assuming that the guns are mechanically sound.