There are people that love Bore Butter and just as many that hate it. Personally I don't use it as it is only good if all the moisture is out of the rifle before leaving any on the surfaces either inside or outside the bore. It can trap moisture under it and cause rusting. T/C sort of pushes it but I personally have never seen any benefit from its use and have seen some rust when the barrel was not completely bone dry before adding the Butter.