I gotta do it, its bugging me.
The Comet mounted the OQF 77mm HV.
Still a 17pdr.....
It's a 17 Pounder in the same way that a 75mm PzIV gun is a 75mm Panther gun.
When people here say 17 Pounder, they are usually referring to the Firefly or the 17 Pounder ATG. The 77mm performs in a radically different role to the conventional 17 Pounder where it actually has AI capacity and much less penetration when compared to the 17 Pounder.
Just to hammer the point home, the "Real" 77mm also used a different ammunition type from the standard 17 Pounder which used the same projectile but a different case/charge - Which was substandard to the 17 Pounder (But could be fit into a Comet's turret and was still better than the US 76mm).
So yes, you could call it a 17 pounder, but you'd be calling it that for the sake of being "Correct" and you'd be very misleading as to the weapon's actual capabilities.
Which is why I'll happily call it a 77mm.