Bore snake once in a blue moon, action very couple hundred rounds with some gun blaster, all the rifles are different, typically if I switch ammo messing around it might take 15-50 to settle back down, not sure if its the lube or lead or what, about the same when I clean them also, mine are semi auto so that's the reason for the spray, I have to be careful to not get much on the buffer as it will deteriorate it on the Marlin. Always put something on the snake for lube, my worst fear is string snapping, The 17hmr is tiny and not sure how bad it would be to punch out a broken bore snake end.