I don't know what the situation is with the Hurricane Mark IIc in real life, I know in Aces High you can separate the four cannons into two sets of primary and secondary fire, however the Whirlwind had a single fire button on the yoke, similar to the Spitfire Mark I (I think you roll the collar for safe / live). I think HTC's choice varies on how to model primary and secondary fire. Perhaps someone can shed some light on this.
Would certainly be a marksman's aircraft, I think I've seen a video of a 1000 yard killshot in an AH Mosquito somewhere about (YouTube I think).