Forgot to mention earlier the APCBC (Armor Piercing Capped Ballistic Cap) projectile with base fuze. The nose of the AP projectile is covered with a soft steel cap and the ballistic cap (cone nose) is attached to the soft steel cap.
The soft steel cap helps to prevent the AP portion of the projectile from bouncing off a harden target when the projectile hits the target at an oblique angle.
But the pictures of the overall projectile profile and metal fracture plane don’t seem to allow for this type of projectile, that is the nose of the AP portion of the APCBC project is typically more pointed and very thick in order to achieve target penetration.
Just looked in U.S. TM-9-1985-3 German Explosive Ordnance, there were a series of anticoncrete explosive projectiles employed by the Germans in WW2 including a 210mm (21cm or approximately 8.25 inches) version that had a projectile nose structure similar to the one shown above and used a thin wall ballistic cap (missing from the projectile fragment shown above, as expected with a fired/exploded projectile). Perhaps someone with more knowledge on the subject can provide more information.