Many of us use WD40- BUT it is not a patch lube, it is used as a bore flush after drying the bore after cleaning, to flush out any residual moisture from the bore's pores. I then wipe down the outside with that last oiling patch.
For lubing patches, I did not have good luck with olive oil, nor did it work for me as an additive to beeswax as a bullet lube.
Bore butter, to me, is most closely related to lip balm, not a patch lube.
For hunting, I now use one of two lubes- Track's mink oil as I always have a tub of that on hand, or Dans favourite, pure Neetsfoot Oil (not compound, which is synthetic) Either the mink oil or neetsfoot oil works for me, in every one of my guns.
You must check point of impact with the oils or a grease, if sighted for a water based lube.
When changing from one lube to another, you must 'develope' the load for accuracy - merely subbing one lube for another can leave you with poorer accuracy than you desire.
For target shooting, many of us us a winter windshield washer fluid with a bit of oil added. Shake it up and lube your precuts in a tin or plastic box. The addition of oil helps reduce the evapouration rate in hot dry climates.
Some of the oils and lubes will rot the patch material over time. Best to only lube enough for the day or week's shooting.
Oh yes - when trying a wad along with patched ball, only my .69 was not negatively effected. I tried wads, both card and oxyoke, in my .40 and .45- both doubled 50 yard group sizes- leaving me with 1 to 1 1/2" groups. The wads are or were not necessary with any lube I use, as this was done just as a test. Wads were mentioned here and I've used them when hunting with my big rifles to separate the lubed patch from the powder charge. My only problem with a wad, is it may remove lube that is left in the bore by the patch. This is bad, because the lube is left there to soften fouling. If the wad removes this film of fouling, the bore may foul excessively between shots. I use only a thin cardboard-type wad - not a thick wad.
Doubling my group sizes to 1" or 1 1/2" sounds OK - however, if you are now getting 3" groups without wads, doubling that would turn them into 6" groups.
Testing is the only way to find out, for sure, for your rifle.