The gun should be tight until it has been finished and hardened . It is the " freed off" this is a job that take some experience as there are many points to watch out for due to the possible moving of the action and parts during hardening .The "Freer "also made sure all components fitted correctly , set the pulls ,timed the action and regulated the ejectors .The gun would then have the barrels blacked the stock fitted and any final easing . Going at it without care can lead to later problems . Just make sure all the bearing surfaces are kept clean and lightly oiled .