3rd BTW: Those old British experiences with oiled cartridges and/or chambers should be a warning against using high-pressure, straight-walled cartridges like Weatherby's or RUMs from oily chambers. It is a well-known fact here that rear-locking bolt rifles like the Steyr-Mannlichers or the Sauer&Sohn 80-90 series, as well as many break-open rifles, will change point-of-impact considerably if oil is left in the chamber. The different case set back will upset vibrations.