[quote=IncredibleBee]Not that part specifically (though it does prove my point that magic isn't the same as science). But a lot of the Imperium's and especially the IG's equipment is laser guns, space ships, and genetic enhancements.You can actually get relatively detailed specifications for how a Bolter works; it's got a similar principal to Gyrojet.[/quote]

And there's literally no reason a Bolter couldn't work through magical means.