I am looking for details on this. I understand it was invented in 1902 – when was it first mass-produced? How much did it cost compared to normal ball ammunition?
In which calibres was it made? Tony Williams mentions in FLYING GUNS at least .303 British, .450 Martini-Henry, and .450 Gatling-Gardner. What about 12-bore shotguns or other rifle or even pistol calibres?
How much nitroglycerine did it actually contain? How was it prevented from blowing up while being transported or loaded? Could it only be used in manually loading weapons or did it stand the stress of cycling in a machine gun?