Think about the fact that your digestive tract is a hole through you . Our bodies are just warped flesh versions of those little jelly cylinders you stuck your ~~ dick ~~ fingers through as a kid . You have a massive hole from your face to your asshole , and you shove shit in it to squeeze and extract energy from it . <| sep |> Tracers tend to be good on machine guns as theres a higer chance of setting fire to the enemy . For cannons the belts with the most HE are best , there are usually air targets and stealth , but some guns will vary , eg for some of the russian cannons ground targets has the HE . AP shells of the size just over pen . <| sep |> Tech is progressing fast . but we are still limited to basic rocket fuel .