Firstly, all barrels will copper foul. No getting around it. Unless your barrel fouls really badly I don't think you will have an issue with it accuracy wise.
When you go to try different brands of bullets it's a good idea to clean the bore as normal. You should shoot 10 fouling shots before shooting for groups to let the bore settle in or else the clean bore will cause fliers.
Once I know what load the rifle likes I usually clean the bore at around 700 to 800 shots.
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