I have also read that break ins we're fairy tales.
Also read that more a barrel was of match quality, the less break in was needed.
So with this 2nd logic, a 10TR is about as rough a precision rifle can be, can't hurt it
And 308 is good for what 8000 rounds?
On a 1000 rounds magnum barrel burner, the 100 or so first rounds can represent 10% of barrel and definately gets more barrels out the door. I plan to do maybe a 50 rounds break in, not even a percent of barrel life.
So worst case scenario, my first outing with it will just be one huge waste of time