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A brief preface lays out the purpose of the essay. Does increasing rifling to the screw level have advantages in weapons, or otherwise? Chapter 1 discusses screw ballistics design, types of shells, the breech, barrel, accelerant, and cleaning methods of the barrel. We note that the inclined plane of a screw is a propeller and affects trajectory and velocity. Chapter 2 wonders if the practicality of spaceships fired by cannons is aided by screw ballistics. By converting energy into screw twist, the early trajectory through the atmosphere uses this energy. A screw slows down acceleration while storing energy in screw twists to protect ship from G-forces, splitting energy between twist and forward motion. The core would not rotate and counter-levered against the hull. We discuss earth boring mole ships using screw ballistics and boring guns for mining, penetrating bunkers. We wonder if the screw could be used for torpedo and submarine propulsion. This is an offshoot of screw ballistics technology. We wonder if slow explosives with higher energy content work well with screw ballistics due to long burn time.