Hornady designed that bullet for rifles such as the 25-20 and similer tube fed lever action cartriges with not much velocity. Using them in your 25-06 with any load close to full power will probably cause the bullet to desintigrate in the air, if that don't happen whatever it hits is going to be transformed into dust particles
The 75gr Hornady HP along with the 87 speer TNT have always been proven varmint performers in my 25-06. If your not worried about red mist effect just use your 120gr deer load. Good luck!