>>326のカタパルトマニュアルにある通り

一体何回引用すれば理解できるのかね
5インチ砲の薬莢Mk3を利用して、プライマー周りにドーナツ状の黒色火薬300グラム、その上に無煙火薬を乗せて、ワッシャーで空間空けて頂部にプラグはめて完成

薬莢内部はプライマーと無煙火薬だけの砲弾用薬莢とは別物

一体何をみてるんだ

The cartridge case used was the 5-inch, Mk.III. The primer was Mk.XIV Mod.1.
The ignition charge of three hundred gram of black powder was contained in a silk bag, made up in doughnut form and placed around the primer at the bottom of the case.
The smokeless powder charge was placed on top of the ignition charge.
On top of the powder came a pyralin washer and then the distance piece.
The mouth of the case was sealed by a cork plug which was pushed down on the distance piece.