foxfire
Sounds like you have a fine shooting rifle.
You have the perfect set up, a light, a medium, and a heavy set of bbls. There is nothing on the planet you cannot hunt with that rifle.
I assume you are shooting your groups right bbl/left bbl, right bbl/left bbl/ etc.
When you get the guns to an outdoor range and get everything "lined up proper" try the 7x65R and the 9,3x74R at 200 and 300 yards. You just might be plesantly suprized.
Keep us posted.