425 Solid (20-units)

Rhino Solids bullets have their application essentially for huge pachyderms, where deep penetration is required.
The "flat meplat" of the bullet is designed for better straight line penetration and will penetrate deeper than a Round Nose Solid, as it encounters less resistance- in effect we have now the same weight behind a smaller frontal surface, and as such, it becomes in essence a "low drag bullet" in target,  hence deeper penetration.