Talking about Achilles, the name of another 17 pdr "pimped up" Sherman variant (m10) by the British. Personally, my kind of favourite american armor was the M18 Hellcat, i wonder what kind of a beast it could have been with a 17pdr, while i don´t know if it would have been able to take it (turret design issues, stability, and other considerations, curious about that)
Btw, i´ve been reading a bit since i´m not quite knowledgeable about armored warfare...i´ve read that one of the arguments found against giving the Sherman the 76mm gun is that, while it was better against tanks, its HE shells were not as powerful, and it was meant to be clearing infantry and defensive positions while the tanks were, in theory, to be delat with by tank destroyers. If the 75mm could have more explosives, and shaped charged ordnance is chemically, not kinetically based for its effects...was there any attempt at using a HEAT like shell for them? If Bazookas could have that tech, it could have been useful for tanks, specially in a 75mm proyectile over a 60mm rocket