Shoot at the weakest armored part.
As a rule of thumb :-
The angle at which your shell impacts the enemy armor is very important. 90 degrees impact provides the highest chance of penetration. If the impact was not at 90 degrees, your shell needs to penetrate thicker than the published stat.
Consider this. An armor plate with 50mm thickness would have an effective thickness when subjected to penetration at :-
Sloped armor increases the effective armor thickness.
Tank destroyers and other tanks that have sloping armor have a higher effective thickness than the published stat. That is of course unless you hit at a 90 degree angle
When shooting at targets moving past you, it is necessary to aim ahead of the spot where you want to hit. Using manual aim is an absolute must for this. There are a few factor to consider :
Typically loaded in all tanks. Solid shot with no explosive core.
Identical to AP, but with greater reliability to penetrate.
Developed later in World War 2 to help penetrate increased armor thickness.
Developed later in World War 2 to help penetrate increased armor thickness. Not effective against spaced armor.
Developed later in World War 2 to help penetrate increased armor thickness. Gun barrels vary the effective range of this round. Sometimes known as Hyper Velocity Armor Piercing (HVAP). American & British tanks used this term.
Not developed until the end of the war and improved upon after the war. This is one of the most effective rounds developed. This is the standard form of ammunition used in modern tanks.
This original optics was developed by Germany for their armored fighting vehicles during World War 2. To use it properly, the gunner must know the size of the target. The large triangle measures 4 mils or 4 meters wide @ 1Km at the bottom of the triangle. The small triangles measure 2 mils or 2 meters @ 1Km. The distance between each triangle top point is 4m wide @1Km. Thus, a t34 is 8m long. The length of the t34 would cover 3 triangle tips left to right @ 1Km.
Working in progress
Working in progress