Double D. They have a nice display of seacoast artillery loading and cleaning implements at Fort McAllister in Georgia. We took a close look at them and took lots of pics too. They also have a terrific collection of projectiles there. Our goal for completion of these experiments is one week depending on weather.
I guess the theory of the "safety rammer" is that everything will just fly perfectly straight out of the bore and that there will be no drag on the part that is outside being held. Might could be, though, that the "safety rammer" will bind somewhat in the persons hands and whip around like a scythe on the outside.
ADDED: Oh...I know I'm going to that "special hell"* for this -
Maybe someone could suggest to Mythbusters that they test this!
Subdjoe, We agree that you are destined to go to that "
Special Place" for suggesting Mythbusters participation! If you don't think we can conduct these experiments more completely and with a lot more thought, and fewer explosives, then we suggest you call them. Before you do, ask yourself this: have we ever sent a cannon projectile into a populated neighborhood to have it gouge a driveway, ricochet then penetrate a house and interior walls, exterior walls and exit, damaging roof tiles of a second house and then penetrate an automobile doing extensive damage to the vehicle, which only moments before had been occupied by children???
As for the section in red above, well....that is precisely why we are going to all the work and expense of doing these experiments, one of which will be done with a blank charge to see what happens to the safety rammer and the "hand" when no projectile is present to raise pressures and gas emergence velocity.