here you go . <| sep |> Having recoil and bloom on the storm bolters is perfectly understandable . I haven ' t played yet so I don ' t know if it ' s over the top , but anyway . Storm bolters are a pistol , that fire . 75 calibre rocket propelled bolts . so yea , recoilbloom makes sense . As for the assault cannon ? it was a weapon designed for use on dreadnoughts or tanks , that was then made useable by terminators . The reason it was considered unusable was due to the massive recoil thanks to the rate of fire supposedly hundreds of rounds per second and the fact that the barrels heat up to 300 degrees during burst firing meaning the barrels would be so warped and damaged after each engagement they ' d swap them out .