Be careful not to let the cerrosafe flow up into the lug recesses in your action or you'll be spending some quality time getting it out. Easier to do than you might think, especially if you try pouring it from a bag with a cut corner, as a lot of people do.Pickup some Cerrosafe and make a cast of your chamber. The process can seem a little daunting ,but just follow the instructions and you'll be fine.
Another thought,have you checked the alignment of your scope bases ,making sure they are not putting bind on the scope itself?
I still have a few 700 actions in one of my safes waiting to be built into rifles again.