Despite the fact that the Spitfires and under-appreciated Hurricanes had either six or eight guns per plane, were the shells a good bit longer with much more gunpowder than those loaded into the Lee-Enfield rifles? Was wondering about the impact force of "rifle-caliber" bullets, and could not picture about six or so rifles, even if flown at high speed, able to tear into the wing tanks or engines on a Ju-88, Do-17, Me-110 or He-111 with much damage caused. But maybe many rounds had incendiaries?
Hurricanes and Spitfires were both equipped with 8 x .303 Brownings during the Battle of Britain, although a tiny handful of experimental cannon armed Spitfires did see combat in the latter stages of the Battle.
The ammunition used for these Colt manufactured Browning MG’s was identical to the standard issue .303 ammo used in the Lee-Enfield rifles, Bren and Lewis LMG’s and Vickers MG’s.