The barrel is free floated but there is not any bedding under the action.
This needs to be fixed friend!!!
My Lyman 47th manual shows a .300 Win Mag with 200 grain JHP and RL22 powder to have a MAX charge of 74.5........velocity is 2878
Loading manuals are free from Alliant...ask at your reloading store for one....also IMR and Hodgdon manuals are free and available on the internet.