I shoot a LOT of new and very low round count factory rifle barrels. They start out getting reasonably "deep" cleaned with Remington 10X and grey JB in their early lives. They don't get lubed to start the next string. Somewhere around 100-150 rounds they "should" be coming into their own.... where dry mopping every 20-40 rounds keeps the bore shiny and happy. The only reason I use any barrel lube or oil is if it's going in for long term storage.
For the most part these are varmint rigs,NOT target guns. 1st round X's count,irrespective of pretty much everything...... I can get 3 shot groups that cloverleaf "usually" within the development period. 5 shot,pretty durn tight groups out of about half of the rigs..... in,traditionally accurate jacketed chamberings. 222,6mm,'06....
It was very windy yesterday,so carried my R700 CDL '06(avatar rig) loaded with 175's. I had forgotten how heavy a nice piece of walnut is. I have gravitated towards light weight for so long. If I was competing in formal BR..... would spend way more time on stock design and bedding. Along with a different approach to a seasoned/fouled bores. Best of luck with your project.