fantom reminds me of a trial carried out in the '50's regarding putting Russian amour out of action with Hunters and 30mm Aden cannon. Some bright spark in the RAF Armaments Branch presumably at Boscombe Down got the idea that whilst 30mm would not penetrate Russian armour it was capable of making a nasty mess of tank tracks. Fortunately the trial was carried out on the ground at Foulness and was quite successful, except for the ricochets and shrapnel from the tracks which reached a considerable height. Thus common sense prevailed and they did not try it with a real flying hunter. The armament bods went off to look for something else instead and eventually settled on SNEB.