Hammer Double Data

[Harry Collins]

A few years ago there was a company named Hammer Double. They sold brass shells that took 209 primers as well as pin fired brass shells. I have the data for 12 gauge and with a Winchester 209 primer, 32 grains of 7625, one over powder card, two cushon wads, 1 1/8 oz of shot and an over shot card you got 1154 fps and 3350 psi. I was going to try this with magnum pistol primers in my CBC brass. Going to work up slowly and use a chronograph. I had tried 7625 with Berdan primers and they went poof. I have data for 700X and brass shells, but in a plastic shell the pressure is more than I want.

Does anyone have Hammer Double data for 16 & 20 gauge?

Harry