When I
Audette Ladder Tested my 30-30, I'll run an oily patch down the barrel, then take a dry patch down it. I'll also keep my breach open when not firing.
That will keep it at a relatively constant temperature.
My bolt rifle it is free floated; whereas, regulating the temperature isn't necessary.
Side note: Using the Audette Ladder Test, I usually find a load within 10 shots.