Try 5:1, or 6:1, water to oil, using water soluble oil or mineral oil( Ballistol-Tm). Just remember to stir or shake up the container of oil and water to mix it well before dipping in the fabric strips. You want an even distribution of oil in the cloth after the water evaporates, so use a rubbler ink roller, or a plastic spatula to rub over the cloth once its laid out flat on a board, or cookie sheet, to remove the excess . Removing the excess helps the fabric dry faster. Rolling or rubbing the fabric insures the even distribution of the oil in the cloth. How much oil is in the ratio largely depends on the relative humidity where you live, and hunt. There is Nothing Set in concrete about the ratio of oil to water. It depends on air temperature, relative humidity( which can change with changes in the temperature and wind)and what a particular barrel likes. I suspect that bore diameter, groove depth, type of grooves, and barrel length all play a part in deciding what ratio works best in a given barrel. Then there is patch fabric thickness, and Ball diameter to Bore diameter, etc. :thumbsup:
This "Dry Lube system" of Dutch Schoultz allows you to lubricate the patches you use around a lead ball, without having so much oil in the cloth that it quickly migrates into your powder charge and fouls it.