maybe this will help, i always shoot a few (1-3) throw away/ fouling shots and leave my deer hunting rifles with some copper fouling until the end of the season, then i do a complete cleaning, on my other non deer hunting rifles i'll do a complete cleaning on them when i get errant shots/ poor grouping, i do run a patch down the tube with some rem oil on it, i just dont use any copper solvents until needed. hope this helps ya

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