Randy - good idea about leaving the breech plug out and puttinga dry patch in there to prevent oil from running down past the breech plug threads. FWIW, I have used Break Free for years to thinly coat rifle bores when in storage. Never had a problem. I do, however, have some orange tags made up with the words "Oiled Bore" on them - hang the tag on the barrel in case I forget . . . .