Penetrator shoots a shot that bounces around the terrain. When it bounces, it creates a tunneler-like projectile that mirrors the bounce direction and has the same power. Because penetrator does not do damage on impact, it is fairly hard to use effectively. However, if used against enemies on the bottom of the map or on flat land, a shot one-third the distance between you and your enemy will result in most if not all projectiles hitting dealing a good amount of damage. It is also important to note that shooting penetrator too high will cause the underground projectiles to despawn.
Same as the penetrator, but bounces more. Shooting at one-third the distance between you and your target will still work at the bottom of the map or on flat land.
If you are at the bottom of the map or on flat land and you know the angle for a high angle 100 power shot, shooting at same angle except at 58 power will cause the tunneling projectiles and final contact to hit the same place.
This works with other power shots as well using the formula. (Original Power) * (.57~.58) = (Penetrator Power)