A .50cal probably does not have the necessary penetration, you are trying to perforate an inch or more of very tough high strength steel. The round shape also means you would have to hit the barrel at almost exactly perpendicular to keep from glancing off. That means you would have to be located 90 degrees from the direction the tank is aiming and hit a target less than 1 inch high but several feet wide (along the axis of the barrel).I agree the op's idea isnt going to work and i know there is much much better targets out there for a sniper but out of interest what about shooting through the side of the tanks barrel with a .50, if you could either dent or damage it the next round fired could get stuck in it probably blowing the barrel and killing the loader (if the tank has one).
Or if the round managed to actually punch a hole ignoring the fact the round would probably again get stuck wouldnt the gun lose alot of pressure when firing and be massively innacurate (ie almost useless)?
agree re your prev.However, a penetrating hit should bend enough metal inward to damage a sabot and cause an uneven release. A full bore HEAT or HESH probably be damaged enough to fall apart in flight, assuming it does not detonate.
Why couldn't a sniper with armor piercing round lob a few rounds into the canons of the enemy tanks prior to firing.?
Even if the tank was at a stand still, the sniper would have to be at the exact level of the muzzle and pointing his gun at the exact angle of the barrel. More often than not, this would leave the sniper exposed, since they are likely to be face down on the ground or high up in a building.Huh? Never ever are you going to hit the muzzle of a tank gun with any accuracy over some distance.
There is a reason why it was never done.
Which would also mean that the sniper is looking straight down the barrel of the cannon and the coax, and nearly straight into the gunner's sight. How likely is the gunner to miss the muzzle flash?Even if the tank was at a stand still, the sniper would have to be at the exact level of the muzzle and pointing his gun at the exact angle of the barrel. More often than not, this would leave the sniper exposed, since they are likely to be face down on the ground or high up in a building.