(No, that's the other lot – Messerschmitt 109 and later Focke-Wulf 190. We mounted our guns in the wings)
Yes.
From ‘Flight Journal’:
‘Squadron Leader Ralph Sorley is widely unappreciated for his contribution to the Spitfire’s armament. The original specification listed four .303-caliber guns, which, considering the nature of combat, would have been woefully inadequate. But Sorley, who had flown with the Royal Navy in WW I, was the right man in the right place at the right time. Working in the operational requirements office, he recommended upgrading the new fighter’s armament to eight machine guns. As it was, eight .30 calibers proved marginal against bombers.
‘In anachronistic terms, the “throw weight” of the British and German fighters’ armament favored the latter. A three-second burst from eight .303s produced 13 pounds of projectiles downrange while the 109’s combined cannon/MG battery yielded 18 pounds. But undoubtedly far less than 10 percent of all rounds fired connected with a target, which is why so few pilots became aces. In one eye-opening episode, six Spitfires fired 7,000 rounds at a Do 17 without destroying it.
‘Sorley recommended sighting the eight machine guns into a ten-foot circle at 100 yards. That was a reasonable approach for an average pilot, but later Fighter Command adapted a 400-yard convergence that was beyond the abilities of most pilots and dispersed the pattern. In some squadrons, pilots could make their own arrangements, but if they had to fly another aircraft, their familiarity vanished. With 300 rounds per gun, the pilot had perhaps 20 seconds of trigger time.
‘Part way through the Battle, Spitfire IIB models arrived with two 20mms in place of four machine guns. Loading 60 rounds per cannon, the new mark was more lethal against bombers but the Hispano-Suiza design was unreliable, especially under G. Modifications only improved performance after the Battle when the mixed armament became standard for Spitfires. The “bump” on the wing of later models accommodated a motor to enhance feeding.’
Blessings.