my books are at home so im going from memory but seems to me the Germans in WWII had a couple guns(by guns i mean tank/artillery pieces) that had barrels that tapered down for shooting tungsten projectiles cause it would increase pressures and therefor up the velocity and penetrating qualities.....but for the life of me i cant remember how much the squeee was.....want to say it was something along the lines of squeezing a 88mm projectile down to 78 or 75mm or something like that....
unfortunately im leaving town shortly and cant go check....maybe one of the WWII experts here knows what im referring to.....seems to me this is what they originally wanted to do with the gun on the Tiger tank but tungsten was in very short supply for the Germans during the war so they just went with the modified 88mm flak gun....
