Brad, I don't see the need for a monometal in a 7-08 either, but if I did, I'd want the extra speed of the 120.
This. Monos are fine if you have velocity, or the animal is close. with moderate velocity rounds, distance is not your friend.
Moderate-velocity rounds do not need monos to do a good job. I am a fan of Abs and Partitions, but Hornady Interlocks are great at 7-08/.308 speeds. The Sierra you have MAY be OK, but I will never load another one for big game based on my limited experience.
My selection would be ABs/Partitions, Hornady Interlocks and then all the rest after that.