most cgi relatd to 40k shows bolters ejecting shell casings runebrush you're yanking our chains ....right...lol
the original bolter was a .68 or .75 caliber caseless smart missile, then some 'smart assed' model maker had to put a mound of shell casing on the base of a Marine (cuz it looked cool!) and so we when back to brass and ammo checks....
That and Dark Angels where painted BLACK! not Dark Green!
Acursed Artsy fartsy types. All ways mess things up.... :smile-big: